213189844 has 12 divisors (see below), whose sum is σ = 426379744. Its totient is φ = 91367064.

The previous prime is 213189841. The next prime is 213189853. The reversal of 213189844 is 448981312.

213189844 is an admirable number.

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 a junction number, because it is equal to n+sod(n) for n = 213189797 and 213189806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213189841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3806934 + ... + 3806989.

Almost surely, 2^213189844 is an apocalyptic number.

It is an amenable number.

213189844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

213189844 is a wasteful number, since it uses less digits than its factorization.

213189844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7613934 (or 7613932 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 213189844 is about 14601.0220190232. The cubic root of 213189844 is about 597.3866374570.

The spelling of 213189844 in words is "two hundred thirteen million, one hundred eighty-nine thousand, eight hundred forty-four".