402412220 has 48 divisors (see below), whose sum is σ = 977453568. Its totient is φ = 136303680.

The previous prime is 402412217. The next prime is 402412279. The reversal of 402412220 is 22214204.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5696 + ... + 28935.

It is an arithmetic number, because the mean of its divisors is an integer number (20363616).

Almost surely, 2^402412220 is an apocalyptic number.

It is an amenable number.

402412220 is an abundant number, since it is smaller than the sum of its proper divisors (575041348).

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

402412220 is a wasteful number, since it uses less digits than its factorization.

402412220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34730 (or 34728 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 402412220 is about 20060.2148542831. The cubic root of 402412220 is about 738.2844480925.

Adding to 402412220 its reverse (22214204), we get a palindrome (424626424).

The spelling of 402412220 in words is "four hundred two million, four hundred twelve thousand, two hundred twenty".