402648668 has 12 divisors (see below), whose sum is σ = 714560112. Its totient is φ = 198488640.

The previous prime is 402648661. The next prime is 402648683. The reversal of 402648668 is 866846204.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402648661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708605 + ... + 709172.

It is an arithmetic number, because the mean of its divisors is an integer number (59546676).

Almost surely, 2^402648668 is an apocalyptic number.

It is an amenable number.

402648668 is a deficient number, since it is larger than the sum of its proper divisors (311911444).

402648668 is a wasteful number, since it uses less digits than its factorization.

402648668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417852 (or 1417850 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 402648668 is about 20066.1074451424. The cubic root of 402648668 is about 738.4290193334.

The spelling of 402648668 in words is "four hundred two million, six hundred forty-eight thousand, six hundred sixty-eight".