402120734988 has 36 divisors (see below), whose sum is σ = 1091470567992. Its totient is φ = 114891638400.

The previous prime is 402120734969. The next prime is 402120735007. The reversal of 402120734988 is 889437021204.

It is an interprime number because it is at equal distance from previous prime (402120734969) and next prime (402120735007).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341938813 + ... + 341939988.

Almost surely, 2^402120734988 is an apocalyptic number.

It is an amenable number.

402120734988 is an abundant number, since it is smaller than the sum of its proper divisors (689349833004).

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

402120734988 is a wasteful number, since it uses less digits than its factorization.

402120734988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683878822 (or 683878813 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 402120734988 in words is "four hundred two billion, one hundred twenty million, seven hundred thirty-four thousand, nine hundred eighty-eight".