90474990 has 32 divisors (see below), whose sum is σ = 223011360. Its totient is φ = 23474304.

The previous prime is 90474977. The next prime is 90475001. The reversal of 90474990 is 9947409.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39645 + ... + 41864.

It is an arithmetic number, because the mean of its divisors is an integer number (6969105).

Almost surely, 2^90474990 is an apocalyptic number.

90474990 is an abundant number, since it is smaller than the sum of its proper divisors (132536370).

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

90474990 is a wasteful number, since it uses less digits than its factorization.

90474990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81556.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 90474990 is about 9511.8342079748. The cubic root of 90474990 is about 448.9274704564.

The spelling of 90474990 in words is "ninety million, four hundred seventy-four thousand, nine hundred ninety".