402544012 has 48 divisors (see below), whose sum is σ = 789848640. Its totient is φ = 178230528.

The previous prime is 402544001. The next prime is 402544039. The reversal of 402544012 is 210445204.

It is a happy number.

It is a super-2 number, since 2×402544012² = 324083363194112288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260113 + ... + 261655.

It is an arithmetic number, because the mean of its divisors is an integer number (16455180).

Almost surely, 2^402544012 is an apocalyptic number.

It is an amenable number.

402544012 is a deficient number, since it is larger than the sum of its proper divisors (387304628).

402544012 is a wasteful number, since it uses less digits than its factorization.

402544012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1760 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 402544012 is about 20063.4994953523. The cubic root of 402544012 is about 738.3650365695.

Adding to 402544012 its reverse (210445204), we get a palindrome (612989216).

The spelling of 402544012 in words is "four hundred two million, five hundred forty-four thousand, twelve".