90213604 has 48 divisors (see below), whose sum is σ = 174530160. Its totient is φ = 40550400.

The previous prime is 90213601. The next prime is 90213661. The reversal of 90213604 is 40631209.

It can be written as a sum of positive squares in 8 ways, for example, as 3686400 + 86527204 = 1920^2 + 9302^2 .

It is not an unprimeable number, because it can be changed into a prime (90213601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467332 + ... + 467524.

It is an arithmetic number, because the mean of its divisors is an integer number (3636045).

Almost surely, 2^90213604 is an apocalyptic number.

It is an amenable number.

90213604 is a deficient number, since it is larger than the sum of its proper divisors (84316556).

90213604 is a wasteful number, since it uses less digits than its factorization.

90213604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 90213604 is about 9498.0842278851. The cubic root of 90213604 is about 448.4947300907.

The spelling of 90213604 in words is "ninety million, two hundred thirteen thousand, six hundred four".