400404131 has 8 divisors (see below), whose sum is σ = 415633680. Its totient is φ = 385269472.

The previous prime is 400404113. The next prime is 400404161. The reversal of 400404131 is 131404004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400404131 is a prime.

It is a super-2 number, since 2×400404131² = 320646936243730322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400404161) 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, 15065 + ... + 32058.

It is an arithmetic number, because the mean of its divisors is an integer number (51954210).

Almost surely, 2^400404131 is an apocalyptic number.

400404131 is a deficient number, since it is larger than the sum of its proper divisors (15229549).

400404131 is a wasteful number, since it uses less digits than its factorization.

400404131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47445.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400404131 is about 20010.1007243842. The cubic root of 400404131 is about 737.0543547635.

Adding to 400404131 its reverse (131404004), we get a palindrome (531808135).

The spelling of 400404131 in words is "four hundred million, four hundred four thousand, one hundred thirty-one".