90399056 has 20 divisors (see below), whose sum is σ = 191071104. Its totient is φ = 41090400.

The previous prime is 90399037. The next prime is 90399091. The reversal of 90399056 is 65099309.

It is a happy number.

It is a super-2 number, since 2×90399056² = 16343978651382272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256640 + ... + 256991.

Almost surely, 2^90399056 is an apocalyptic number.

It is an amenable number.

90399056 is an abundant number, since it is smaller than the sum of its proper divisors (100672048).

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

90399056 is a wasteful number, since it uses less digits than its factorization.

90399056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513650 (or 513644 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 90399056 is about 9507.8418161011. The cubic root of 90399056 is about 448.8018431064.

The spelling of 90399056 in words is "ninety million, three hundred ninety-nine thousand, fifty-six".