402840456 has 32 divisors (see below), whose sum is σ = 1016347200. Its totient is φ = 133047360.

The previous prime is 402840407. The next prime is 402840461. The reversal of 402840456 is 654048204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74380 + ... + 79611.

It is an arithmetic number, because the mean of its divisors is an integer number (31760850).

Almost surely, 2^402840456 is an apocalyptic number.

It is an amenable number.

402840456 is an abundant number, since it is smaller than the sum of its proper divisors (613506744).

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

402840456 is a wasteful number, since it uses less digits than its factorization.

402840456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154109 (or 154105 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 402840456 is about 20070.8857801543. The cubic root of 402840456 is about 738.5462425741.

The spelling of 402840456 in words is "four hundred two million, eight hundred forty thousand, four hundred fifty-six".