404791128 has 64 divisors (see below), whose sum is σ = 1285056000. Its totient is φ = 115654176.

The previous prime is 404791111. The next prime is 404791129. The reversal of 404791128 is 821197404.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 404791092 and 404791101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404791129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132348 + ... + 135371.

It is an arithmetic number, because the mean of its divisors is an integer number (20079000).

Almost surely, 2^404791128 is an apocalyptic number.

It is an amenable number.

404791128 is an abundant number, since it is smaller than the sum of its proper divisors (880264872).

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

404791128 is a wasteful number, since it uses less digits than its factorization.

404791128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267741 (or 267731 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 404791128 is about 20119.4216616681. The cubic root of 404791128 is about 739.7364096500.

The spelling of 404791128 in words is "four hundred four million, seven hundred ninety-one thousand, one hundred twenty-eight".