90724972 has 48 divisors (see below), whose sum is σ = 184246272. Its totient is φ = 38744640.

The previous prime is 90724957. The next prime is 90724987. The reversal of 90724972 is 27942709.

It is an interprime number because it is at equal distance from previous prime (90724957) and next prime (90724987).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35853 + ... + 38299.

It is an arithmetic number, because the mean of its divisors is an integer number (3838464).

Almost surely, 2^90724972 is an apocalyptic number.

90724972 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

90724972 is an abundant number, since it is smaller than the sum of its proper divisors (93521300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90724972 is a wasteful number, since it uses less digits than its factorization.

90724972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518 (or 2516 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 90724972 is about 9524.9657217231. The cubic root of 90724972 is about 449.3405517854.

The spelling of 90724972 in words is "ninety million, seven hundred twenty-four thousand, nine hundred seventy-two".