402399515 has 12 divisors (see below), whose sum is σ = 561717216. Its totient is φ = 275930928.

The previous prime is 402399451. The next prime is 402399539. The reversal of 402399515 is 515993204.

It is not a de Polignac number, because 402399515 - 2⁶ = 402399451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 820979 + ... + 821468.

It is an arithmetic number, because the mean of its divisors is an integer number (46809768).

Almost surely, 2^402399515 is an apocalyptic number.

402399515 is a deficient number, since it is larger than the sum of its proper divisors (159317701).

402399515 is a wasteful number, since it uses less digits than its factorization.

402399515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642466 (or 1642459 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 402399515 is about 20059.8981802002. The cubic root of 402399515 is about 738.2766782799.

The spelling of 402399515 in words is "four hundred two million, three hundred ninety-nine thousand, five hundred fifteen".