404042442 has 64 divisors (see below), whose sum is σ = 868734720. Its totient is φ = 125024256.

The previous prime is 404042407. The next prime is 404042473. The reversal of 404042442 is 244240404.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 624163 + ... + 624809.

It is an arithmetic number, because the mean of its divisors is an integer number (13573980).

Almost surely, 2^404042442 is an apocalyptic number.

404042442 is an abundant number, since it is smaller than the sum of its proper divisors (464692278).

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

404042442 is a wasteful number, since it uses less digits than its factorization.

404042442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815.

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 404042442 is about 20100.8069987252. The cubic root of 404042442 is about 739.2800655800.

Adding to 404042442 its reverse (244240404), we get a palindrome (648282846).

The spelling of 404042442 in words is "four hundred four million, forty-two thousand, four hundred forty-two".