90705924 has 36 divisors (see below), whose sum is σ = 241353840. Its totient is φ = 28643760.

The previous prime is 90705917. The next prime is 90705929. The reversal of 90705924 is 42950709.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (90705929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65622 + ... + 66989.

Almost surely, 2^90705924 is an apocalyptic number.

It is an amenable number.

90705924 is an abundant number, since it is smaller than the sum of its proper divisors (150647916).

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

90705924 is a wasteful number, since it uses less digits than its factorization.

90705924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132640 (or 132635 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 90705924 is about 9523.9657706231. The cubic root of 90705924 is about 449.3091027525.

The spelling of 90705924 in words is "ninety million, seven hundred five thousand, nine hundred twenty-four".