213636904 has 32 divisors (see below), whose sum is σ = 433114920. Its totient is φ = 98205696.

The previous prime is 213636901. The next prime is 213636919. The reversal of 213636904 is 409636312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 164608900 + 49028004 = 12830^2 + 7002^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213636904.

It is not an unprimeable number, because it can be changed into a prime (213636901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22732 + ... + 30724.

Almost surely, 2^213636904 is an apocalyptic number.

It is an amenable number.

213636904 is an abundant number, since it is smaller than the sum of its proper divisors (219478016).

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

213636904 is a wasteful number, since it uses less digits than its factorization.

213636904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8269 (or 8265 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 213636904 is about 14616.3232038704. The cubic root of 213636904 is about 597.8039200093.

The spelling of 213636904 in words is "two hundred thirteen million, six hundred thirty-six thousand, nine hundred four".