90765688 has 16 divisors (see below), whose sum is σ = 183277080. Its totient is φ = 41891808.

The previous prime is 90765673. The next prime is 90765739. The reversal of 90765688 is 88656709.

It is a super-2 number, since 2×90765688² = 16476820236226688, which contains 22 as substring.

It is a congruent number.

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, 436270 + ... + 436477.

Almost surely, 2^90765688 is an apocalyptic number.

It is an amenable number.

90765688 is an abundant number, since it is smaller than the sum of its proper divisors (92511392).

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

90765688 is a wasteful number, since it uses less digits than its factorization.

90765688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872766 (or 872762 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 90765688 is about 9527.1028125029. The cubic root of 90765688 is about 449.4077608213.

The spelling of 90765688 in words is "ninety million, seven hundred sixty-five thousand, six hundred eighty-eight".