402420568440 has 64 divisors (see below), whose sum is σ = 1317012773760. Its totient is φ = 97556501120.

The previous prime is 402420568393. The next prime is 402420568463. The reversal of 402420568440 is 44865024204.

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, 152430714 + ... + 152433353.

It is an arithmetic number, because the mean of its divisors is an integer number (20578324590).

Almost surely, 2^402420568440 is an apocalyptic number.

402420568440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402420568440 is an abundant number, since it is smaller than the sum of its proper divisors (914592205320).

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

402420568440 is a wasteful number, since it uses less digits than its factorization.

402420568440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304864092 (or 304864088 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 39.

The spelling of 402420568440 in words is "four hundred two billion, four hundred twenty million, five hundred sixty-eight thousand, four hundred forty".