402878152 has 8 divisors (see below), whose sum is σ = 755396550. Its totient is φ = 201439072.

The previous prime is 402878149. The next prime is 402878173. The reversal of 402878152 is 251878204.

It can be written as a sum of positive squares in only one way, i.e., 350663076 + 52215076 = 18726^2 + 7226^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25179877 + ... + 25179892.

Almost surely, 2^402878152 is an apocalyptic number.

It is an amenable number.

402878152 is a deficient number, since it is larger than the sum of its proper divisors (352518398).

402878152 is a wasteful number, since it uses less digits than its factorization.

402878152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50359775 (or 50359771 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 402878152 is about 20071.8248298454. The cubic root of 402878152 is about 738.5692784687.

The spelling of 402878152 in words is "four hundred two million, eight hundred seventy-eight thousand, one hundred fifty-two".