213888790 has 16 divisors (see below), whose sum is σ = 390747312. Its totient is φ = 84278304.

The previous prime is 213888769. The next prime is 213888877. The reversal of 213888790 is 97888312.

It is a self number, because there is not a number n which added to its sum of digits gives 213888790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158949 + ... + 160288.

It is an arithmetic number, because the mean of its divisors is an integer number (24421707).

Almost surely, 2^213888790 is an apocalyptic number.

213888790 is a deficient number, since it is larger than the sum of its proper divisors (176858522).

213888790 is a wasteful number, since it uses less digits than its factorization.

213888790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319311.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 213888790 is about 14624.9372648227. The cubic root of 213888790 is about 598.0387722202.

The spelling of 213888790 in words is "two hundred thirteen million, eight hundred eighty-eight thousand, seven hundred ninety".