406213902 has 48 divisors (see below), whose sum is σ = 931046688. Its totient is φ = 127733760.

The previous prime is 406213891. The next prime is 406213909. The reversal of 406213902 is 209312604.

406213902 is a `hidden beast` number, since 4 + 0 + 621 + 39 + 0 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406213909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23502 + ... + 36942.

It is an arithmetic number, because the mean of its divisors is an integer number (19396806).

Almost surely, 2^406213902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406213902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (465523344).

406213902 is an abundant number, since it is smaller than the sum of its proper divisors (524832786).

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

406213902 is a wasteful number, since it uses less digits than its factorization.

406213902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13545 (or 13542 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 406213902 is about 20154.7488696833. The cubic root of 406213902 is about 740.6020800043.

The spelling of 406213902 in words is "four hundred six million, two hundred thirteen thousand, nine hundred two".