402404820 has 24 divisors (see below), whose sum is σ = 1126733664. Its totient is φ = 107307936.

The previous prime is 402404801. The next prime is 402404837. The reversal of 402404820 is 28404204.

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, 3353314 + ... + 3353433.

It is an arithmetic number, because the mean of its divisors is an integer number (46947236).

Almost surely, 2^402404820 is an apocalyptic number.

It is an amenable number.

402404820 is an abundant number, since it is smaller than the sum of its proper divisors (724328844).

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

402404820 is a wasteful number, since it uses less digits than its factorization.

402404820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6706759 (or 6706757 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 402404820 is about 20060.0304087506. The cubic root of 402404820 is about 738.2799226017.

The spelling of 402404820 in words is "four hundred two million, four hundred four thousand, eight hundred twenty".