404638228 has 24 divisors (see below), whose sum is σ = 724252032. Its totient is φ = 197721984.

The previous prime is 404638217. The next prime is 404638229. The reversal of 404638228 is 822836404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404638229) 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, 182575 + ... + 184777.

It is an arithmetic number, because the mean of its divisors is an integer number (30177168).

Almost surely, 2^404638228 is an apocalyptic number.

It is an amenable number.

404638228 is a deficient number, since it is larger than the sum of its proper divisors (319613804).

404638228 is a wasteful number, since it uses less digits than its factorization.

404638228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3231 (or 3229 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 404638228 is about 20115.6214917660. The cubic root of 404638228 is about 739.6432587769.

The spelling of 404638228 in words is "four hundred four million, six hundred thirty-eight thousand, two hundred twenty-eight".