90723292 has 24 divisors (see below), whose sum is σ = 177230592. Its totient is φ = 40278000.

The previous prime is 90723289. The next prime is 90723319. The reversal of 90723292 is 29232709.

It is a super-2 number, since 2×90723292² = 16461431422634528, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22084 + ... + 25867.

It is an arithmetic number, because the mean of its divisors is an integer number (7384608).

Almost surely, 2^90723292 is an apocalyptic number.

It is an amenable number.

90723292 is a deficient number, since it is larger than the sum of its proper divisors (86507300).

90723292 is a wasteful number, since it uses less digits than its factorization.

90723292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48009 (or 48007 counting only the distinct ones).

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

The square root of 90723292 is about 9524.8775320211. The cubic root of 90723292 is about 449.3377782132.

The spelling of 90723292 in words is "ninety million, seven hundred twenty-three thousand, two hundred ninety-two".