213304788 has 18 divisors (see below), whose sum is σ = 539187194. Its totient is φ = 71101584.

The previous prime is 213304757. The next prime is 213304799. The reversal of 213304788 is 887403312.

It can be written as a sum of positive squares in only one way, i.e., 211179024 + 2125764 = 14532^2 + 1458^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5925133 = 213304788 / (2 + 1 + 3 + 3 + 0 + 4 + 7 + 8 + 8).

It is a congruent number.

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, 2962531 + ... + 2962602.

Almost surely, 2^213304788 is an apocalyptic number.

It is an amenable number.

213304788 is an abundant number, since it is smaller than the sum of its proper divisors (325882406).

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

213304788 is a wasteful number, since it uses less digits than its factorization.

213304788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5925143 (or 5925138 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 213304788 is about 14604.9576514278. The cubic root of 213304788 is about 597.4939810205.

The spelling of 213304788 in words is "two hundred thirteen million, three hundred four thousand, seven hundred eighty-eight".