90643392 has 84 divisors (see below), whose sum is σ = 296942256. Its totient is φ = 25896960.

The previous prime is 90643381. The next prime is 90643393. The reversal of 90643392 is 29334609.

It is a happy number.

90643392 is a `hidden beast` number, since 9 + 0 + 643 + 3 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90643393) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 7209 + ... + 15272.

Almost surely, 2^90643392 is an apocalyptic number.

It is an amenable number.

90643392 is an abundant number, since it is smaller than the sum of its proper divisors (206298864).

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

90643392 is a wasteful number, since it uses less digits than its factorization.

90643392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22506 (or 22493 counting only the distinct ones).

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

The square root of 90643392 is about 9520.6823284889. The cubic root of 90643392 is about 449.2058288813.

The spelling of 90643392 in words is "ninety million, six hundred forty-three thousand, three hundred ninety-two".