90639324 has 30 divisors (see below), whose sum is σ = 236949944. Its totient is φ = 30213000.

The previous prime is 90639317. The next prime is 90639347. The reversal of 90639324 is 42393609.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 139552 + ... + 140199.

Almost surely, 2^90639324 is an apocalyptic number.

It is an amenable number.

90639324 is an abundant number, since it is smaller than the sum of its proper divisors (146310620).

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

90639324 is a wasteful number, since it uses less digits than its factorization.

90639324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279767 (or 279756 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 90639324 is about 9520.4686859419. The cubic root of 90639324 is about 449.1991087862.

The spelling of 90639324 in words is "ninety million, six hundred thirty-nine thousand, three hundred twenty-four".