404505228 has 12 divisors (see below), whose sum is σ = 943845560. Its totient is φ = 134835072.

The previous prime is 404505223. The next prime is 404505271. The reversal of 404505228 is 822505404.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 404505195 and 404505204.

It is not an unprimeable number, because it can be changed into a prime (404505223) 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, 16854373 + ... + 16854396.

Almost surely, 2^404505228 is an apocalyptic number.

It is an amenable number.

404505228 is an abundant number, since it is smaller than the sum of its proper divisors (539340332).

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

404505228 is a wasteful number, since it uses less digits than its factorization.

404505228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33708776 (or 33708774 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 404505228 is about 20112.3153316569. The cubic root of 404505228 is about 739.5622124442.

The spelling of 404505228 in words is "four hundred four million, five hundred five thousand, two hundred twenty-eight".