404042290 has 32 divisors (see below), whose sum is σ = 751932720. Its totient is φ = 156211200.

The previous prime is 404042263. The next prime is 404042299. The reversal of 404042290 is 92240404.

It can be written as a sum of positive squares in 8 ways, for example, as 241709209 + 162333081 = 15547^2 + 12741^2 .

It is not an unprimeable number, because it can be changed into a prime (404042299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40170 + ... + 49210.

Almost surely, 2^404042290 is an apocalyptic number.

404042290 is a deficient number, since it is larger than the sum of its proper divisors (347890430).

404042290 is a wasteful number, since it uses less digits than its factorization.

404042290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9198.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 404042290 is about 20100.8032177821. The cubic root of 404042290 is about 739.2799728747.

Adding to 404042290 its reverse (92240404), we get a palindrome (496282694).

The spelling of 404042290 in words is "four hundred four million, forty-two thousand, two hundred ninety".