402331378 has 12 divisors (see below), whose sum is σ = 610876638. Its totient is φ = 198735200.

The previous prime is 402331373. The next prime is 402331381. The reversal of 402331378 is 873133204.

It can be written as a sum of positive squares in only one way, i.e., 367603929 + 34727449 = 19173^2 + 5893^2 .

It is not an unprimeable number, because it can be changed into a prime (402331373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 823 + ... + 28378.

Almost surely, 2^402331378 is an apocalyptic number.

402331378 is a deficient number, since it is larger than the sum of its proper divisors (208545260).

402331378 is an equidigital number, since it uses as much as digits as its factorization.

402331378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29369 (or 29286 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 402331378 is about 20058.1997696703. The cubic root of 402331378 is about 738.2350059321.

The spelling of 402331378 in words is "four hundred two million, three hundred thirty-one thousand, three hundred seventy-eight".