400031134722 has 18 divisors (see below), whose sum is σ = 866739939273. Its totient is φ = 133342817112.

The previous prime is 400031134697. The next prime is 400031134729. The reversal of 400031134722 is 227431130004.

It is a happy number.

400031134722 is a `hidden beast` number, since 4 + 0 + 0 + 0 + 311 + 347 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 218639472921 + 181391661801 = 467589^2 + 425901^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=447231.

It is not an unprimeable number, because it can be changed into a prime (400031134729) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2608848 + ... + 2757924.

Almost surely, 2^400031134722 is an apocalyptic number.

400031134722 is an abundant number, since it is smaller than the sum of its proper divisors (466708804551).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400031134722 is an frugal number, since it uses more digits than its factorization.

400031134722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298162 (or 149082 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

Adding to 400031134722 its reverse (227431130004), we get a palindrome (627462264726).

The spelling of 400031134722 in words is "four hundred billion, thirty-one million, one hundred thirty-four thousand, seven hundred twenty-two".