400344312 has 16 divisors (see below), whose sum is σ = 1000860840. Its totient is φ = 133448096.

The previous prime is 400344293. The next prime is 400344331. The reversal of 400344312 is 213443004.

It is an interprime number because it is at equal distance from previous prime (400344293) and next prime (400344331).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8340483 + ... + 8340530.

Almost surely, 2^400344312 is an apocalyptic number.

It is an amenable number.

400344312 is an abundant number, since it is smaller than the sum of its proper divisors (600516528).

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

400344312 is a wasteful number, since it uses less digits than its factorization.

400344312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16681022 (or 16681018 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 400344312 is about 20008.6059484413. The cubic root of 400344312 is about 737.0176484736.

Adding to 400344312 its reverse (213443004), we get a palindrome (613787316).

The spelling of 400344312 in words is "four hundred million, three hundred forty-four thousand, three hundred twelve".