402665444 has 24 divisors (see below), whose sum is σ = 716421888. Its totient is φ = 197984160.

The previous prime is 402665441. The next prime is 402665447. The reversal of 402665444 is 444566204.

It is an interprime number because it is at equal distance from previous prime (402665441) and next prime (402665447).

It is not an unprimeable number, because it can be changed into a prime (402665441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230414 + ... + 232154.

It is an arithmetic number, because the mean of its divisors is an integer number (29850912).

Almost surely, 2^402665444 is an apocalyptic number.

It is an amenable number.

402665444 is a deficient number, since it is larger than the sum of its proper divisors (313756444).

402665444 is a wasteful number, since it uses less digits than its factorization.

402665444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675 (or 2673 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

The square root of 402665444 is about 20066.5254590823. The cubic root of 402665444 is about 738.4392745213.

The spelling of 402665444 in words is "four hundred two million, six hundred sixty-five thousand, four hundred forty-four".