404042342 has 16 divisors (see below), whose sum is σ = 661576464. Its totient is φ = 183540000.

The previous prime is 404042339. The next prime is 404042347. The reversal of 404042342 is 243240404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404042347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36992 + ... + 46652.

It is an arithmetic number, because the mean of its divisors is an integer number (41348529).

Almost surely, 2^404042342 is an apocalyptic number.

404042342 is a deficient number, since it is larger than the sum of its proper divisors (257534122).

404042342 is a wasteful number, since it uses less digits than its factorization.

404042342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11575.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 404042342 is about 20100.8045112627. The cubic root of 404042342 is about 739.2800045897.

Adding to 404042342 its reverse (243240404), we get a palindrome (647282746).

The spelling of 404042342 in words is "four hundred four million, forty-two thousand, three hundred forty-two".