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28730304 = 2632311609
BaseRepresentation
bin110110110011…
…0001111000000
32000001122120100
41231212033000
524323332204
62503442400
7466126551
oct155461700
960048510
1028730304
1115243559
129756400
135c4c0a5
143b5c328
1527c7a39
hex1b663c0

28730304 has 84 divisors (see below), whose sum is σ = 85059520. Its totient is φ = 9262080.

The previous prime is 28730297. The next prime is 28730341. The reversal of 28730304 is 40303782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17052 + ... + 18660.

Almost surely, 228730304 is an apocalyptic number.

28730304 is a gapful number since it is divisible by the number (24) 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 28730304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42529760).

28730304 is an abundant number, since it is smaller than the sum of its proper divisors (56329216).

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

28730304 is a wasteful number, since it uses less digits than its factorization.

28730304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658 (or 1645 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 28730304 is about 5360.0656712395. The cubic root of 28730304 is about 306.2763107202.

The spelling of 28730304 in words is "twenty-eight million, seven hundred thirty thousand, three hundred four".

Divisors: 1 2 3 4 6 8 9 12 16 18 24 31 32 36 48 62 64 72 93 96 124 144 186 192 248 279 288 372 496 558 576 744 992 1116 1488 1609 1984 2232 2976 3218 4464 4827 5952 6436 8928 9654 12872 14481 17856 19308 25744 28962 38616 49879 51488 57924 77232 99758 102976 115848 149637 154464 199516 231696 299274 308928 399032 448911 463392 598548 798064 897822 926784 1197096 1596128 1795644 2394192 3192256 3591288 4788384 7182576 9576768 14365152 28730304