393228863 has 4 divisors (see below), whose sum is σ = 393402648. Its totient is φ = 393055080.

The previous prime is 393228839. The next prime is 393228911. The reversal of 393228863 is 368822393.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 393228863 - 2⁸ = 393228607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393228833) 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, 83453 + ... + 88038.

It is an arithmetic number, because the mean of its divisors is an integer number (98350662).

Almost surely, 2^393228863 is an apocalyptic number.

393228863 is a deficient number, since it is larger than the sum of its proper divisors (173785).

393228863 is a wasteful number, since it uses less digits than its factorization.

393228863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173784.

The product of its digits is 373248, while the sum is 44.

The square root of 393228863 is about 19829.9990670701. Note that the first 3 decimals coincide. The cubic root of 393228863 is about 732.6251036775.

The spelling of 393228863 in words is "three hundred ninety-three million, two hundred twenty-eight thousand, eight hundred sixty-three".