402404664 has 32 divisors (see below), whose sum is σ = 1029409920. Its totient is φ = 131015136.

The previous prime is 402404633. The next prime is 402404669. The reversal of 402404664 is 466404204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402404669) 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 7 ways as a sum of consecutive naturals, for example, 193932 + ... + 195995.

It is an arithmetic number, because the mean of its divisors is an integer number (32169060).

Almost surely, 2^402404664 is an apocalyptic number.

It is an amenable number.

402404664 is an abundant number, since it is smaller than the sum of its proper divisors (627005256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402404664 is a wasteful number, since it uses less digits than its factorization.

402404664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389979 (or 389975 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 402404664 is about 20060.0265204212. The cubic root of 402404664 is about 738.2798271988.

Adding to 402404664 its reverse (466404204), we get a palindrome (868808868).

The spelling of 402404664 in words is "four hundred two million, four hundred four thousand, six hundred sixty-four".