90489357720 has 96 divisors (see below), whose sum is σ = 304231496400. Its totient is φ = 23298406656.

The previous prime is 90489357713. The next prime is 90489357731. The reversal of 90489357720 is 2775398409.

90489357720 is a `hidden beast` number, since 9 + 0 + 48 + 9 + 3 + 577 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4323342 + ... + 4344221.

Almost surely, 2^90489357720 is an apocalyptic number.

90489357720 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90489357720 is an abundant number, since it is smaller than the sum of its proper divisors (213742138680).

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

90489357720 is a wasteful number, since it uses less digits than its factorization.

90489357720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8667609 (or 8667602 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 90489357720 in words is "ninety billion, four hundred eighty-nine million, three hundred fifty-seven thousand, seven hundred twenty".