400244312 has 32 divisors (see below), whose sum is σ = 836060400. Its totient is φ = 178356864.

The previous prime is 400244297. The next prime is 400244333. The reversal of 400244312 is 213442004.

It is a congruent number.

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, 63338 + ... + 69369.

Almost surely, 2^400244312 is an apocalyptic number.

It is an amenable number.

400244312 is an abundant number, since it is smaller than the sum of its proper divisors (435816088).

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

400244312 is a wasteful number, since it uses less digits than its factorization.

400244312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132755 (or 132751 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 400244312 is about 20006.1068676542. The cubic root of 400244312 is about 736.9562780482.

Adding to 400244312 its reverse (213442004), we get a palindrome (613686316).

The spelling of 400244312 in words is "four hundred million, two hundred forty-four thousand, three hundred twelve".