393873228 has 144 divisors (see below), whose sum is σ = 1186791424. Its totient is φ = 107775360.

The previous prime is 393873199. The next prime is 393873239. The reversal of 393873228 is 822378393.

It is a happy number.

It is a super-2 number, since 2×393873228² = 310272239470279968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (435456) is a multiple of the sum of its prime divisors (567).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 991926 + ... + 992322.

Almost surely, 2^393873228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 393873228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (593395712).

393873228 is an abundant number, since it is smaller than the sum of its proper divisors (792918196).

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

393873228 is a wasteful number, since it uses less digits than its factorization.

393873228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 567 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 393873228 is about 19846.2396438217. The cubic root of 393873228 is about 733.0250576625.

The spelling of 393873228 in words is "three hundred ninety-three million, eight hundred seventy-three thousand, two hundred twenty-eight".