404399968 has 24 divisors (see below), whose sum is σ = 909900432. Its totient is φ = 173314176.

The previous prime is 404399951. The next prime is 404399969. The reversal of 404399968 is 869993404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404399969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902455 + ... + 902902.

It is an arithmetic number, because the mean of its divisors is an integer number (37912518).

Almost surely, 2^404399968 is an apocalyptic number.

It is an amenable number.

404399968 is an abundant number, since it is smaller than the sum of its proper divisors (505500464).

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

404399968 is a wasteful number, since it uses less digits than its factorization.

404399968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805374 (or 1805366 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 52.

The square root of 404399968 is about 20109.6983567631. The cubic root of 404399968 is about 739.4980574663.

The spelling of 404399968 in words is "four hundred four million, three hundred ninety-nine thousand, nine hundred sixty-eight".