402618680 has 32 divisors (see below), whose sum is σ = 945280800. Its totient is φ = 154045056.

The previous prime is 402618679. The next prime is 402618707. The reversal of 402618680 is 86816204.

It is a self number, because there is not a number n which added to its sum of digits gives 402618680.

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, 217895 + ... + 219734.

It is an arithmetic number, because the mean of its divisors is an integer number (29540025).

Almost surely, 2^402618680 is an apocalyptic number.

402618680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402618680 is an abundant number, since it is smaller than the sum of its proper divisors (542662120).

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

402618680 is a wasteful number, since it uses less digits than its factorization.

402618680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437663 (or 437659 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 402618680 is about 20065.3602011028. The cubic root of 402618680 is about 738.4106869253.

The spelling of 402618680 in words is "four hundred two million, six hundred eighteen thousand, six hundred eighty".