90403972 has 12 divisors (see below), whose sum is σ = 158372620. Its totient is φ = 45154656.

The previous prime is 90403969. The next prime is 90403981. The reversal of 90403972 is 27930409.

It can be written as a sum of positive squares in 2 ways, for example, as 83612736 + 6791236 = 9144^2 + 2606^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7347 + ... + 15322.

Almost surely, 2^90403972 is an apocalyptic number.

It is an amenable number.

90403972 is a deficient number, since it is larger than the sum of its proper divisors (67968648).

90403972 is a wasteful number, since it uses less digits than its factorization.

90403972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23670 (or 23668 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 90403972 is about 9508.1003360293. The cubic root of 90403972 is about 448.8099784047.

The spelling of 90403972 in words is "ninety million, four hundred three thousand, nine hundred seventy-two".