400667031 has 12 divisors (see below), whose sum is σ = 581293752. Its totient is φ = 265933296.

The previous prime is 400667027. The next prime is 400667039. The reversal of 400667031 is 130766004.

It is not a de Polignac number, because 400667031 - 2² = 400667027 is a prime.

It is a super-2 number, since 2×400667031² = 321068139460709922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400666986 and 400667004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400667039) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 96016 + ... + 100101.

It is an arithmetic number, because the mean of its divisors is an integer number (48441146).

Almost surely, 2^400667031 is an apocalyptic number.

400667031 is a deficient number, since it is larger than the sum of its proper divisors (180626721).

400667031 is a wasteful number, since it uses less digits than its factorization.

400667031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196350 (or 196347 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 400667031 is about 20016.6688287537. The cubic root of 400667031 is about 737.2156328165.

The spelling of 400667031 in words is "four hundred million, six hundred sixty-seven thousand, thirty-one".