402680444 has 12 divisors (see below), whose sum is σ = 711156600. Its totient is φ = 199492848.

The previous prime is 402680437. The next prime is 402680449. The reversal of 402680444 is 444086204.

It is a super-3 number, since 3×402680444³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 402680444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402680449) 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 3 ways as a sum of consecutive naturals, for example, 461354 + ... + 462225.

It is an arithmetic number, because the mean of its divisors is an integer number (59263050).

Almost surely, 2^402680444 is an apocalyptic number.

It is an amenable number.

402680444 is a deficient number, since it is larger than the sum of its proper divisors (308476156).

402680444 is a wasteful number, since it uses less digits than its factorization.

402680444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923692 (or 923690 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 402680444 is about 20066.8992123846. The cubic root of 402680444 is about 738.4484437971.

The spelling of 402680444 in words is "four hundred two million, six hundred eighty thousand, four hundred forty-four".