90637072 has 10 divisors (see below), whose sum is σ = 175609358. Its totient is φ = 45318528.

The previous prime is 90637069. The next prime is 90637133. The reversal of 90637072 is 27073609.

It can be written as a sum of positive squares in only one way, i.e., 53231616 + 37405456 = 7296^2 + 6116^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832393 + ... + 2832424.

Almost surely, 2^90637072 is an apocalyptic number.

It is an amenable number.

90637072 is a deficient number, since it is larger than the sum of its proper divisors (84972286).

90637072 is a wasteful number, since it uses less digits than its factorization.

90637072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5664825 (or 5664819 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 90637072 is about 9520.3504137190. The cubic root of 90637072 is about 449.1953885291.

The spelling of 90637072 in words is "ninety million, six hundred thirty-seven thousand, seventy-two".