90724672 has 14 divisors (see below), whose sum is σ = 180031898. Its totient is φ = 45362304.

The previous prime is 90724661. The next prime is 90724679. The reversal of 90724672 is 27642709.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 89415936 + 1308736 = 9456^2 + 1144^2 .

It is a super-2 number, since 2×90724672² = 16461932219015168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90724679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 708723 + ... + 708850.

Almost surely, 2^90724672 is an apocalyptic number.

It is an amenable number.

90724672 is a deficient number, since it is larger than the sum of its proper divisors (89307226).

90724672 is a wasteful number, since it uses less digits than its factorization.

90724672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417585 (or 1417575 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 90724672 is about 9524.9499736219. The cubic root of 90724672 is about 449.3400565072.

The spelling of 90724672 in words is "ninety million, seven hundred twenty-four thousand, six hundred seventy-two".