213438890 has 16 divisors (see below), whose sum is σ = 439074432. Its totient is φ = 73179024.

The previous prime is 213438877. The next prime is 213438917. The reversal of 213438890 is 98834312.

213438890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1524494 + ... + 1524633.

It is an arithmetic number, because the mean of its divisors is an integer number (27442152).

Almost surely, 2^213438890 is an apocalyptic number.

213438890 is an abundant number, since it is smaller than the sum of its proper divisors (225635542).

213438890 is a wasteful number, since it uses less digits than its factorization.

213438890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049141.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 213438890 is about 14609.5479053939. The cubic root of 213438890 is about 597.6191670719.

The spelling of 213438890 in words is "two hundred thirteen million, four hundred thirty-eight thousand, eight hundred ninety".