404031042 has 24 divisors (see below), whose sum is σ = 878209644. Its totient is φ = 134244864.

The previous prime is 404031013. The next prime is 404031049. The reversal of 404031042 is 240130404.

It can be written as a sum of positive squares in 2 ways, for example, as 319372641 + 84658401 = 17871^2 + 9201^2 .

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

It is not an unprimeable number, because it can be changed into a prime (404031049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30223 + ... + 41490.

Almost surely, 2^404031042 is an apocalyptic number.

404031042 is an abundant number, since it is smaller than the sum of its proper divisors (474178602).

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

404031042 is a wasteful number, since it uses less digits than its factorization.

404031042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72034 (or 72031 counting only the distinct ones).

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

The square root of 404031042 is about 20100.5234260205. The cubic root of 404031042 is about 739.2731126206.

Adding to 404031042 its reverse (240130404), we get a palindrome (644161446).

The spelling of 404031042 in words is "four hundred four million, thirty-one thousand, forty-two".