400311332 has 24 divisors (see below), whose sum is σ = 724441536. Its totient is φ = 193441248.

The previous prime is 400311299. The next prime is 400311347. The reversal of 400311332 is 233113004.

It is a happy number.

It is a super-2 number, since 2×400311332² = 320498325055228448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400311332.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113 + ... + 28295.

It is an arithmetic number, because the mean of its divisors is an integer number (30185064).

Almost surely, 2^400311332 is an apocalyptic number.

It is an amenable number.

400311332 is a deficient number, since it is larger than the sum of its proper divisors (324130204).

400311332 is a wasteful number, since it uses less digits than its factorization.

400311332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28307 (or 28305 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 400311332 is about 20007.7817860951. The cubic root of 400311332 is about 736.9974096369.

Adding to 400311332 its reverse (233113004), we get a palindrome (633424336).

The spelling of 400311332 in words is "four hundred million, three hundred eleven thousand, three hundred thirty-two".