400131234 has 12 divisors (see below), whose sum is σ = 866951046. Its totient is φ = 133377072.

The previous prime is 400131223. The next prime is 400131293. The reversal of 400131234 is 432131004.

400131234 is a `hidden beast` number, since 400 + 1 + 31 + 234 = 666.

It can be written as a sum of positive squares in only one way, i.e., 213890625 + 186240609 = 14625^2 + 13647^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 22229513 = 400131234 / (4 + 0 + 0 + 1 + 3 + 1 + 2 + 3 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11114739 + ... + 11114774.

Almost surely, 2^400131234 is an apocalyptic number.

400131234 is an abundant number, since it is smaller than the sum of its proper divisors (466819812).

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

400131234 is a wasteful number, since it uses less digits than its factorization.

400131234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22229521 (or 22229518 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 400131234 is about 20003.2805809447. The cubic root of 400131234 is about 736.8868692824.

Adding to 400131234 its reverse (432131004), we get a palindrome (832262238).

The spelling of 400131234 in words is "four hundred million, one hundred thirty-one thousand, two hundred thirty-four".