213870402 has 32 divisors (see below), whose sum is σ = 476280000. Its totient is φ = 71138304.

The previous prime is 213870383. The next prime is 213870409. The reversal of 213870402 is 204078312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (213870409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22978 + ... + 30914.

It is an arithmetic number, because the mean of its divisors is an integer number (14883750).

Almost surely, 2^213870402 is an apocalyptic number.

213870402 is an abundant number, since it is smaller than the sum of its proper divisors (262409598).

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

213870402 is a wasteful number, since it uses less digits than its factorization.

213870402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8447 (or 8441 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 213870402 is about 14624.3085990415. The cubic root of 213870402 is about 598.0216339492.

The spelling of 213870402 in words is "two hundred thirteen million, eight hundred seventy thousand, four hundred two".