402040444 has 48 divisors (see below), whose sum is σ = 778982400. Its totient is φ = 180398016.

The previous prime is 402040439. The next prime is 402040477. The reversal of 402040444 is 444040204.

It is a super-2 number, since 2×402040444² = 323273037223434272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437017 + ... + 437935.

It is an arithmetic number, because the mean of its divisors is an integer number (16228800).

Almost surely, 2^402040444 is an apocalyptic number.

It is an amenable number.

402040444 is a deficient number, since it is larger than the sum of its proper divisors (376941956).

402040444 is a wasteful number, since it uses less digits than its factorization.

402040444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 402040444 is about 20050.9462120869. The cubic root of 402040444 is about 738.0570187754.

Adding to 402040444 its reverse (444040204), we get a palindrome (846080648).

The spelling of 402040444 in words is "four hundred two million, forty thousand, four hundred forty-four".