400231044 has 30 divisors (see below), whose sum is σ = 1046283854. Its totient is φ = 133410240.

The previous prime is 400231019. The next prime is 400231093. The reversal of 400231044 is 440132004.

It can be written as a sum of positive squares in only one way, i.e., 392040000 + 8191044 = 19800^2 + 2862^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 617317 + ... + 617964.

Almost surely, 2^400231044 is an apocalyptic number.

It is an amenable number.

400231044 is an abundant number, since it is smaller than the sum of its proper divisors (646052810).

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

400231044 is a wasteful number, since it uses less digits than its factorization.

400231044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235297 (or 1235286 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 400231044 is about 20005.7752661575. The cubic root of 400231044 is about 736.9481346521.

Adding to 400231044 its reverse (440132004), we get a palindrome (840363048).

The spelling of 400231044 in words is "four hundred million, two hundred thirty-one thousand, forty-four".