28597928688 has 400 divisors, whose sum is σ = 99300072960. Its totient is φ = 7772889600.

The previous prime is 28597928657. The next prime is 28597928701. The reversal of 28597928688 is 88682979582.

It is a happy number.

28597928688 is a `hidden beast` number, since 2 + 8 + 597 + 9 + 28 + 6 + 8 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 18678483 + ... + 18680013.

Almost surely, 2^28597928688 is an apocalyptic number.

28597928688 is a gapful number since it is divisible by the number (28) 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 28597928688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49650036480).

28597928688 is an abundant number, since it is smaller than the sum of its proper divisors (70702144272).

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

28597928688 is a wasteful number, since it uses less digits than its factorization.

28597928688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658 (or 1643 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 72.

The spelling of 28597928688 in words is "twenty-eight billion, five hundred ninety-seven million, nine hundred twenty-eight thousand, six hundred eighty-eight".