394512228 has 48 divisors (see below), whose sum is σ = 1115795520. Its totient is φ = 119548800.

The previous prime is 394512211. The next prime is 394512233. The reversal of 394512228 is 822215493.

It is a happy number.

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 = 394512192 and 394512201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164853 + ... + 167228.

It is an arithmetic number, because the mean of its divisors is an integer number (23245740).

Almost surely, 2^394512228 is an apocalyptic number.

It is an amenable number.

394512228 is an abundant number, since it is smaller than the sum of its proper divisors (721283292).

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

394512228 is a wasteful number, since it uses less digits than its factorization.

394512228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332105 (or 332097 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 394512228 is about 19862.3318872684. The cubic root of 394512228 is about 733.4212510755.

The spelling of 394512228 in words is "three hundred ninety-four million, five hundred twelve thousand, two hundred twenty-eight".