90612688 has 10 divisors (see below), whose sum is σ = 175562114. Its totient is φ = 45306336.

The previous prime is 90612661. The next prime is 90612713. The reversal of 90612688 is 88621609.

It can be written as a sum of positive squares in only one way, i.e., 89340304 + 1272384 = 9452^2 + 1128^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90612688.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2831631 + ... + 2831662.

Almost surely, 2^90612688 is an apocalyptic number.

It is an amenable number.

90612688 is a deficient number, since it is larger than the sum of its proper divisors (84949426).

90612688 is a wasteful number, since it uses less digits than its factorization.

90612688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663301 (or 5663295 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 90612688 is about 9519.0697024447. The cubic root of 90612688 is about 449.1551027222.

The spelling of 90612688 in words is "ninety million, six hundred twelve thousand, six hundred eighty-eight".