402774015 has 32 divisors (see below), whose sum is σ = 737809920. Its totient is φ = 183798144.

The previous prime is 402774007. The next prime is 402774019. The reversal of 402774015 is 510477204.

It is not a de Polignac number, because 402774015 - 2³ = 402774007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402774019) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 61897 + ... + 68093.

It is an arithmetic number, because the mean of its divisors is an integer number (23056560).

Almost surely, 2^402774015 is an apocalyptic number.

402774015 is a deficient number, since it is larger than the sum of its proper divisors (335035905).

402774015 is a wasteful number, since it uses less digits than its factorization.

402774015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6831.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 402774015 is about 20069.2305532624. The cubic root of 402774015 is about 738.5056372111.

The spelling of 402774015 in words is "four hundred two million, seven hundred seventy-four thousand, fifteen".