402820644620 has 24 divisors (see below), whose sum is σ = 845946589488. Its totient is φ = 161123832000.

The previous prime is 402820644599. The next prime is 402820644623. The reversal of 402820644620 is 26446028204.

It is not an unprimeable number, because it can be changed into a prime (402820644623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526595 + ... + 1040645.

It is an arithmetic number, because the mean of its divisors is an integer number (35247774562).

Almost surely, 2^402820644620 is an apocalyptic number.

It is an amenable number.

402820644620 is an abundant number, since it is smaller than the sum of its proper divisors (443125944868).

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

402820644620 is a wasteful number, since it uses less digits than its factorization.

402820644620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553241 (or 553239 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 38.

The spelling of 402820644620 in words is "four hundred two billion, eight hundred twenty million, six hundred forty-four thousand, six hundred twenty".