8213904 has 30 divisors (see below), whose sum is σ = 22987926. Its totient is φ = 2737920.

The previous prime is 8213897. The next prime is 8213951. The reversal of 8213904 is 4093128.

It can be written as a sum of positive squares in only one way, i.e., 6656400 + 1557504 = 2580^2 + 1248^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28377 + ... + 28664.

Almost surely, 2^8213904 is an apocalyptic number.

It is an amenable number.

8213904 is an abundant number, since it is smaller than the sum of its proper divisors (14774022).

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

8213904 is a wasteful number, since it uses less digits than its factorization.

8213904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57055 (or 57046 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 8213904 is about 2865.9909281085. The cubic root of 8213904 is about 201.7668780765.

The spelling of 8213904 in words is "eight million, two hundred thirteen thousand, nine hundred four".