90039688 has 16 divisors (see below), whose sum is σ = 170058780. Its totient is φ = 44690688.

The previous prime is 90039683. The next prime is 90039707. The reversal of 90039688 is 88693009.

It can be written as a sum of positive squares in 2 ways, for example, as 88698724 + 1340964 = 9418^2 + 1158^2 .

It is not an unprimeable number, because it can be changed into a prime (90039683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39981 + ... + 42172.

Almost surely, 2^90039688 is an apocalyptic number.

It is an amenable number.

90039688 is a deficient number, since it is larger than the sum of its proper divisors (80019092).

90039688 is a wasteful number, since it uses less digits than its factorization.

90039688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82296 (or 82292 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 90039688 is about 9488.9244912161. The cubic root of 90039688 is about 448.2063383054.

The spelling of 90039688 in words is "ninety million, thirty-nine thousand, six hundred eighty-eight".