400304631 has 8 divisors (see below), whose sum is σ = 542489584. Its totient is φ = 262494720.

The previous prime is 400304623. The next prime is 400304633. The reversal of 400304631 is 136403004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400304631 - 2³ = 400304623 is a prime.

It is a super-2 number, since 2×400304631² = 320487595200092322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400304598 and 400304607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400304633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093546 + ... + 1093911.

It is an arithmetic number, because the mean of its divisors is an integer number (67811198).

Almost surely, 2^400304631 is an apocalyptic number.

400304631 is a deficient number, since it is larger than the sum of its proper divisors (142184953).

400304631 is a wasteful number, since it uses less digits than its factorization.

400304631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187521.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 400304631 is about 20007.6143255512. The cubic root of 400304631 is about 736.9932972983.

Adding to 400304631 its reverse (136403004), we get a palindrome (536707635).

The spelling of 400304631 in words is "four hundred million, three hundred four thousand, six hundred thirty-one".