404859728 has 40 divisors (see below), whose sum is σ = 965438208. Its totient is φ = 160163712.

The previous prime is 404859727. The next prime is 404859751. The reversal of 404859728 is 827958404.

It is a happy number.

It is a super-2 number, since 2×404859728² = 327822798712467968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404859727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137576 + ... + 140487.

Almost surely, 2^404859728 is an apocalyptic number.

It is an amenable number.

404859728 is an abundant number, since it is smaller than the sum of its proper divisors (560578480).

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

404859728 is a wasteful number, since it uses less digits than its factorization.

404859728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278091 (or 278085 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 404859728 is about 20121.1264098211. The cubic root of 404859728 is about 739.7781950284.

The spelling of 404859728 in words is "four hundred four million, eight hundred fifty-nine thousand, seven hundred twenty-eight".