213872836 has 12 divisors (see below), whose sum is σ = 374450860. Its totient is φ = 106886880.

The previous prime is 213872809. The next prime is 213872843. The reversal of 213872836 is 638278312.

It can be written as a sum of positive squares in 2 ways, for example, as 87310336 + 126562500 = 9344^2 + 11250^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1635 + ... + 20746.

Almost surely, 2^213872836 is an apocalyptic number.

It is an amenable number.

213872836 is a deficient number, since it is larger than the sum of its proper divisors (160578024).

213872836 is a wasteful number, since it uses less digits than its factorization.

213872836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24774 (or 24772 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 213872836 is about 14624.3918164141. The cubic root of 213872836 is about 598.0239025803.

The spelling of 213872836 in words is "two hundred thirteen million, eight hundred seventy-two thousand, eight hundred thirty-six".