404774028 has 18 divisors (see below), whose sum is σ = 1023178884. Its totient is φ = 134924664.

The previous prime is 404773991. The next prime is 404774057. The reversal of 404774028 is 820477404.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 11243723 = 404774028 / (4 + 0 + 4 + 7 + 7 + 4 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 404773983 and 404774001.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5621826 + ... + 5621897.

Almost surely, 2^404774028 is an apocalyptic number.

It is an amenable number.

404774028 is an abundant number, since it is smaller than the sum of its proper divisors (618404856).

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

404774028 is a wasteful number, since it uses less digits than its factorization.

404774028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11243733 (or 11243728 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 404774028 is about 20118.9966946665. The cubic root of 404774028 is about 739.7259930262.

The spelling of 404774028 in words is "four hundred four million, seven hundred seventy-four thousand, twenty-eight".