90740864 has 16 divisors (see below), whose sum is σ = 180773070. Its totient is φ = 45370368.

The previous prime is 90740857. The next prime is 90740873. The reversal of 90740864 is 46804709.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 84787264 + 5953600 = 9208^2 + 2440^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354329 + ... + 354584.

Almost surely, 2^90740864 is an apocalyptic number.

It is an amenable number.

90740864 is a deficient number, since it is larger than the sum of its proper divisors (90032206).

90740864 is an equidigital number, since it uses as much as digits as its factorization.

90740864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708927 (or 708915 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 90740864 is about 9525.7999139180. The cubic root of 90740864 is about 449.3667867642.

The spelling of 90740864 in words is "ninety million, seven hundred forty thousand, eight hundred sixty-four".