404472728 has 16 divisors (see below), whose sum is σ = 827330760. Its totient is φ = 183851200.

The previous prime is 404472727. The next prime is 404472743. The reversal of 404472728 is 827274404.

It is a junction number, because it is equal to n+sod(n) for n = 404472691 and 404472700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404472727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2298053 + ... + 2298228.

Almost surely, 2^404472728 is an apocalyptic number.

It is an amenable number.

404472728 is an abundant number, since it is smaller than the sum of its proper divisors (422858032).

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

404472728 is a wasteful number, since it uses less digits than its factorization.

404472728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4596298 (or 4596294 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 38.

The square root of 404472728 is about 20111.5073527570. The cubic root of 404472728 is about 739.5424051883.

The spelling of 404472728 in words is "four hundred four million, four hundred seventy-two thousand, seven hundred twenty-eight".