404004342 has 64 divisors (see below), whose sum is σ = 952224768. Its totient is φ = 111888000.

The previous prime is 404004317. The next prime is 404004373. The reversal of 404004342 is 243400404.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 180792 + ... + 183012.

It is an arithmetic number, because the mean of its divisors is an integer number (14878512).

Almost surely, 2^404004342 is an apocalyptic number.

404004342 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 404004342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (476112384).

404004342 is an abundant number, since it is smaller than the sum of its proper divisors (548220426).

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

404004342 is a wasteful number, since it uses less digits than its factorization.

404004342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 404004342 is about 20099.8592532386. The cubic root of 404004342 is about 739.2568275461.

Adding to 404004342 its reverse (243400404), we get a palindrome (647404746).

The spelling of 404004342 in words is "four hundred four million, four thousand, three hundred forty-two".