400342312 has 16 divisors (see below), whose sum is σ = 790149600. Its totient is φ = 189635760.

The previous prime is 400342309. The next prime is 400342321. The reversal of 400342312 is 213243004.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 400342312.

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, 1316764 + ... + 1317067.

It is an arithmetic number, because the mean of its divisors is an integer number (49384350).

Almost surely, 2^400342312 is an apocalyptic number.

It is an amenable number.

400342312 is a deficient number, since it is larger than the sum of its proper divisors (389807288).

400342312 is a wasteful number, since it uses less digits than its factorization.

400342312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633856 (or 2633852 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 400342312 is about 20008.5559698845. Note that the first 3 decimals coincide. The cubic root of 400342312 is about 737.0164211653.

Adding to 400342312 its reverse (213243004), we get a palindrome (613585316).

The spelling of 400342312 in words is "four hundred million, three hundred forty-two thousand, three hundred twelve".