404240402 has 16 divisors (see below), whose sum is σ = 623476224. Its totient is φ = 196452000.

The previous prime is 404240401. The next prime is 404240407. The reversal of 404240402 is 204042404.

It is not an unprimeable number, because it can be changed into a prime (404240401) 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, 13127 + ... + 31317.

It is an arithmetic number, because the mean of its divisors is an integer number (38967264).

Almost surely, 2^404240402 is an apocalyptic number.

404240402 is a deficient number, since it is larger than the sum of its proper divisors (219235822).

404240402 is a wasteful number, since it uses less digits than its factorization.

404240402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18505.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 404240402 is about 20105.7305761318. The cubic root of 404240402 is about 739.4007822606.

Adding to 404240402 its reverse (204042404), we get a palindrome (608282806).

It can be divided in two parts, 4042 and 40402, that added together give a palindrome (44444).

The spelling of 404240402 in words is "four hundred four million, two hundred forty thousand, four hundred two".