90618928 has 20 divisors (see below), whose sum is σ = 175778928. Its totient is φ = 45256640.

The previous prime is 90618911. The next prime is 90618943. The reversal of 90618928 is 82981609.

It is a happy number.

It is a super-2 number, since 2×90618928² = 16423580223738368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13413 + ... + 19003.

Almost surely, 2^90618928 is an apocalyptic number.

It is an amenable number.

90618928 is a deficient number, since it is larger than the sum of its proper divisors (85160000).

90618928 is a wasteful number, since it uses less digits than its factorization.

90618928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6612 (or 6606 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 90618928 is about 9519.3974599236. The cubic root of 90618928 is about 449.1654127703.

The spelling of 90618928 in words is "ninety million, six hundred eighteen thousand, nine hundred twenty-eight".