90256520 has 16 divisors (see below), whose sum is σ = 203077260. Its totient is φ = 36102592.

The previous prime is 90256513. The next prime is 90256541. The reversal of 90256520 is 2565209.

It can be written as a sum of positive squares in 2 ways, for example, as 78464164 + 11792356 = 8858^2 + 3434^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128167 + ... + 1128246.

Almost surely, 2^90256520 is an apocalyptic number.

It is an amenable number.

90256520 is an abundant number, since it is smaller than the sum of its proper divisors (112820740).

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

90256520 is a wasteful number, since it uses less digits than its factorization.

90256520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256424 (or 2256420 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 90256520 is about 9500.3431516972. The cubic root of 90256520 is about 448.5658374317.

The spelling of 90256520 in words is "ninety million, two hundred fifty-six thousand, five hundred twenty".