90856936728 has 48 divisors (see below), whose sum is σ = 246086346480. Its totient is φ = 30283740864.

The previous prime is 90856936717. The next prime is 90856936739. The reversal of 90856936728 is 82763965809.

90856936728 is a `hidden beast` number, since 9 + 0 + 8 + 569 + 3 + 67 + 2 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (90856936717) and next prime (90856936739).

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, 1555101 + ... + 1612467.

It is an arithmetic number, because the mean of its divisors is an integer number (5126798885).

Almost surely, 2^90856936728 is an apocalyptic number.

It is an amenable number.

90856936728 is an abundant number, since it is smaller than the sum of its proper divisors (155229409752).

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

90856936728 is a wasteful number, since it uses less digits than its factorization.

90856936728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79376 (or 79369 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 90856936728 in words is "ninety billion, eight hundred fifty-six million, nine hundred thirty-six thousand, seven hundred twenty-eight".