402819220 has 24 divisors (see below), whose sum is σ = 852012000. Its totient is φ = 159967392.

The previous prime is 402819163. The next prime is 402819269. The reversal of 402819220 is 22918204.

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, 69670 + ... + 75229.

It is an arithmetic number, because the mean of its divisors is an integer number (35500500).

Almost surely, 2^402819220 is an apocalyptic number.

It is an amenable number.

402819220 is an abundant number, since it is smaller than the sum of its proper divisors (449192780).

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

402819220 is a wasteful number, since it uses less digits than its factorization.

402819220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145047 (or 145045 counting only the distinct ones).

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

The square root of 402819220 is about 20070.3567481996. The cubic root of 402819220 is about 738.5332646955.

The spelling of 402819220 in words is "four hundred two million, eight hundred nineteen thousand, two hundred twenty".