90417664 has 20 divisors (see below), whose sum is σ = 180659754. Its totient is φ = 45208576.

The previous prime is 90417619. The next prime is 90417683. The reversal of 90417664 is 46671409.

It can be written as a sum of positive squares in only one way, i.e., 76038400 + 14379264 = 8720^2 + 3792^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87787 + ... + 88810.

Almost surely, 2^90417664 is an apocalyptic number.

It is an amenable number.

90417664 is a deficient number, since it is larger than the sum of its proper divisors (90242090).

90417664 is an equidigital number, since it uses as much as digits as its factorization.

90417664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176615 (or 176599 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 90417664 is about 9508.8203264127. The cubic root of 90417664 is about 448.8326352116.

The spelling of 90417664 in words is "ninety million, four hundred seventeen thousand, six hundred sixty-four".