213838406 has 16 divisors (see below), whose sum is σ = 339704064. Its totient is φ = 100742664.

The previous prime is 213838363. The next prime is 213838423. The reversal of 213838406 is 604838312.

It is a happy number.

213838406 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 31610 + ... + 37773.

It is an arithmetic number, because the mean of its divisors is an integer number (21231504).

Almost surely, 2^213838406 is an apocalyptic number.

213838406 is a deficient number, since it is larger than the sum of its proper divisors (125865658).

213838406 is a wasteful number, since it uses less digits than its factorization.

213838406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69475.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 213838406 is about 14623.2146260663. The cubic root of 213838406 is about 597.9918101957.

The spelling of 213838406 in words is "two hundred thirteen million, eight hundred thirty-eight thousand, four hundred six".