28597174020 has 36 divisors (see below), whose sum is σ = 86744761740. Its totient is φ = 7625913024.

The previous prime is 28597174003. The next prime is 28597174027. The reversal of 28597174020 is 2047179582.

It is a happy number.

28597174020 is a `hidden beast` number, since 2 + 8 + 597 + 17 + 40 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18108546624 + 10488627396 = 134568^2 + 102414^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (28597174027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79436415 + ... + 79436774.

It is an arithmetic number, because the mean of its divisors is an integer number (2409576715).

Almost surely, 2^28597174020 is an apocalyptic number.

28597174020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28597174020 is an abundant number, since it is smaller than the sum of its proper divisors (58147587720).

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

28597174020 is a wasteful number, since it uses less digits than its factorization.

28597174020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158873204 (or 158873199 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 28597174020 in words is "twenty-eight billion, five hundred ninety-seven million, one hundred seventy-four thousand, twenty".