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28887936 = 273711977
BaseRepresentation
bin110111000110…
…0101110000000
32000100122210120
41232030232000
524343403221
62511100240
7500354250
oct156145600
960318716
1028887936
1115340a30
129811680
135ca5a6c
143b9d960
1528095c6
hex1b8cb80

28887936 has 128 divisors (see below), whose sum is σ = 95765760. Its totient is φ = 7495680.

The previous prime is 28887917. The next prime is 28887941. The reversal of 28887936 is 63978882.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29080 + ... + 30056.

It is an arithmetic number, because the mean of its divisors is an integer number (748170).

Almost surely, 228887936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28887936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47882880).

28887936 is an abundant number, since it is smaller than the sum of its proper divisors (66877824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28887936 is a wasteful number, since it uses less digits than its factorization.

28887936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 1000 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 28887936 is about 5374.7498546444. The cubic root of 28887936 is about 306.8354290601.

The spelling of 28887936 in words is "twenty-eight million, eight hundred eighty-seven thousand, nine hundred thirty-six".

Divisors: 1 2 3 4 6 7 8 11 12 14 16 21 22 24 28 32 33 42 44 48 56 64 66 77 84 88 96 112 128 132 154 168 176 192 224 231 264 308 336 352 384 448 462 528 616 672 704 896 924 977 1056 1232 1344 1408 1848 1954 2112 2464 2688 2931 3696 3908 4224 4928 5862 6839 7392 7816 9856 10747 11724 13678 14784 15632 20517 21494 23448 27356 29568 31264 32241 41034 42988 46896 54712 62528 64482 75229 82068 85976 93792 109424 125056 128964 150458 164136 171952 187584 218848 225687 257928 300916 328272 343904 375168 437696 451374 515856 601832 656544 687808 875392 902748 1031712 1203664 1313088 1375616 1805496 2063424 2407328 2626176 3610992 4126848 4814656 7221984 9629312 14443968 28887936