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69488880 = 24351392083
BaseRepresentation
bin1000010010001…
…01000011110000
311211202101211020
410021011003300
5120242121010
610521215440
71502434326
oct411050360
9154671736
1069488880
113625202a
121b331580
131151cca6
14932bd16
156179470
hex42450f0

69488880 has 80 divisors (see below), whose sum is σ = 217069440. Its totient is φ = 18388224.

The previous prime is 69488879. The next prime is 69488893. The reversal of 69488880 is 8888496.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32319 + ... + 34401.

It is an arithmetic number, because the mean of its divisors is an integer number (2713368).

Almost surely, 269488880 is an apocalyptic number.

69488880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69488880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108534720).

69488880 is an abundant number, since it is smaller than the sum of its proper divisors (147580560).

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

69488880 is a wasteful number, since it uses less digits than its factorization.

69488880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238 (or 2232 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The square root of 69488880 is about 8335.9990403070. Note that the first 3 decimals coincide. The cubic root of 69488880 is about 411.1229970321.

The spelling of 69488880 in words is "sixty-nine million, four hundred eighty-eight thousand, eight hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 139 240 278 417 556 695 834 1112 1390 1668 2083 2085 2224 2780 3336 4166 4170 5560 6249 6672 8332 8340 10415 11120 12498 16664 16680 20830 24996 31245 33328 33360 41660 49992 62490 83320 99984 124980 166640 249960 289537 499920 579074 868611 1158148 1447685 1737222 2316296 2895370 3474444 4343055 4632592 5790740 6948888 8686110 11581480 13897776 17372220 23162960 34744440 69488880