90640916 has 24 divisors (see below), whose sum is σ = 161387520. Its totient is φ = 44537472.

The previous prime is 90640871. The next prime is 90640939. The reversal of 90640916 is 61904609.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56615 + ... + 58193.

It is an arithmetic number, because the mean of its divisors is an integer number (6724480).

Almost surely, 2^90640916 is an apocalyptic number.

It is an amenable number.

90640916 is a deficient number, since it is larger than the sum of its proper divisors (70746604).

90640916 is a wasteful number, since it uses less digits than its factorization.

90640916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823 (or 1821 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 90640916 is about 9520.5522949039. The cubic root of 90640916 is about 449.2017386999.

The spelling of 90640916 in words is "ninety million, six hundred forty thousand, nine hundred sixteen".