90978924 has 24 divisors (see below), whose sum is σ = 219132928. Its totient is φ = 29347920.

The previous prime is 90978907. The next prime is 90978949. The reversal of 90978924 is 42987909.

It is a happy number.

It is a super-2 number, since 2×90978924² = 16554329224395552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121912 + ... + 122655.

Almost surely, 2^90978924 is an apocalyptic number.

It is an amenable number.

90978924 is an abundant number, since it is smaller than the sum of its proper divisors (128154004).

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

90978924 is a wasteful number, since it uses less digits than its factorization.

90978924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244605 (or 244603 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 90978924 is about 9538.2872676388. The cubic root of 90978924 is about 449.7594170794.

The spelling of 90978924 in words is "ninety million, nine hundred seventy-eight thousand, nine hundred twenty-four".