404402239 has 8 divisors (see below), whose sum is σ = 428483088. Its totient is φ = 380353920.

The previous prime is 404402237. The next prime is 404402263. The reversal of 404402239 is 932204404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 404402239 - 2¹ = 404402237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404402233) 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, 20349 + ... + 34969.

It is an arithmetic number, because the mean of its divisors is an integer number (53560386).

Almost surely, 2^404402239 is an apocalyptic number.

404402239 is a deficient number, since it is larger than the sum of its proper divisors (24080849).

404402239 is a wasteful number, since it uses less digits than its factorization.

404402239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16265.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 404402239 is about 20109.7548219763. The cubic root of 404402239 is about 739.4994417369.

The spelling of 404402239 in words is "four hundred four million, four hundred two thousand, two hundred thirty-nine".