402668608 has 14 divisors (see below), whose sum is σ = 799045646. Its totient is φ = 201334272.

The previous prime is 402668603. The next prime is 402668611. The reversal of 402668608 is 806866204.

It can be written as a sum of positive squares in only one way, i.e., 344176704 + 58491904 = 18552^2 + 7648^2 .

It is not an unprimeable number, because it can be changed into a prime (402668603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3145785 + ... + 3145912.

It is an arithmetic number, because the mean of its divisors is an integer number (57074689).

Almost surely, 2^402668608 is an apocalyptic number.

It is an amenable number.

402668608 is a deficient number, since it is larger than the sum of its proper divisors (396377038).

402668608 is an equidigital number, since it uses as much as digits as its factorization.

402668608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6291709 (or 6291699 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 402668608 is about 20066.6042966916. The cubic root of 402668608 is about 738.4412086462.

The spelling of 402668608 in words is "four hundred two million, six hundred sixty-eight thousand, six hundred eight".