400244012 has 24 divisors (see below), whose sum is σ = 808419360. Its totient is φ = 169833600.

The previous prime is 400243981. The next prime is 400244021. The reversal of 400244012 is 210442004.

It is a super-2 number, since 2×400244012² = 320390538283712288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67937 + ... + 73592.

It is an arithmetic number, because the mean of its divisors is an integer number (33684140).

Almost surely, 2^400244012 is an apocalyptic number.

It is an amenable number.

400244012 is an abundant number, since it is smaller than the sum of its proper divisors (408175348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400244012 is a wasteful number, since it uses less digits than its factorization.

400244012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141641 (or 141639 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 400244012 is about 20006.0993699422. The cubic root of 400244012 is about 736.9560939216.

Adding to 400244012 its reverse (210442004), we get a palindrome (610686016).

The spelling of 400244012 in words is "four hundred million, two hundred forty-four thousand, twelve".