402678915 has 32 divisors (see below), whose sum is σ = 683899200. Its totient is φ = 201621504.

The previous prime is 402678893. The next prime is 402678931. The reversal of 402678915 is 519876204.

402678915 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 402678915 - 2⁶ = 402678851 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112737 + ... + 116253.

It is an arithmetic number, because the mean of its divisors is an integer number (21371850).

Almost surely, 2^402678915 is an apocalyptic number.

402678915 is a deficient number, since it is larger than the sum of its proper divisors (281220285).

402678915 is a wasteful number, since it uses less digits than its factorization.

402678915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 402678915 is about 20066.8611147832. The cubic root of 402678915 is about 738.4475091527.

The spelling of 402678915 in words is "four hundred two million, six hundred seventy-eight thousand, nine hundred fifteen".