402918220 has 12 divisors (see below), whose sum is σ = 846128304. Its totient is φ = 161167280.

The previous prime is 402918203. The next prime is 402918239. The reversal of 402918220 is 22819204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10072936 + ... + 10072975.

It is an arithmetic number, because the mean of its divisors is an integer number (70510692).

Almost surely, 2^402918220 is an apocalyptic number.

It is an amenable number.

402918220 is an abundant number, since it is smaller than the sum of its proper divisors (443210084).

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

402918220 is a wasteful number, since it uses less digits than its factorization.

402918220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20145920 (or 20145918 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 402918220 is about 20072.8229205560. The cubic root of 402918220 is about 738.5937623088.

The spelling of 402918220 in words is "four hundred two million, nine hundred eighteen thousand, two hundred twenty".