402402664 has 32 divisors (see below), whose sum is σ = 792198720. Its totient is φ = 191258496.

The previous prime is 402402647. The next prime is 402402677. The reversal of 402402664 is 466204204.

It is an unprimeable number.

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, 23284 + ... + 36700.

It is an arithmetic number, because the mean of its divisors is an integer number (24756210).

Almost surely, 2^402402664 is an apocalyptic number.

It is an amenable number.

402402664 is a deficient number, since it is larger than the sum of its proper divisors (389796056).

402402664 is a wasteful number, since it uses less digits than its factorization.

402402664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13609 (or 13605 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 402402664 is about 20059.9766699765. The cubic root of 402402664 is about 738.2786040834.

Adding to 402402664 its reverse (466204204), we get a palindrome (868606868).

The spelling of 402402664 in words is "four hundred two million, four hundred two thousand, six hundred sixty-four".