393440223 has 16 divisors (see below), whose sum is σ = 586236672. Its totient is φ = 232632000.

The previous prime is 393440213. The next prime is 393440227. The reversal of 393440223 is 322044393.

It is not a de Polignac number, because 393440223 - 2²⁰ = 392391647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393440227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144043 + ... + 146748.

It is an arithmetic number, because the mean of its divisors is an integer number (36639792).

Almost surely, 2^393440223 is an apocalyptic number.

393440223 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

393440223 is a deficient number, since it is larger than the sum of its proper divisors (192796449).

393440223 is a wasteful number, since it uses less digits than its factorization.

393440223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290846.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 393440223 is about 19835.3276504322. The cubic root of 393440223 is about 732.7563418454.

The spelling of 393440223 in words is "three hundred ninety-three million, four hundred forty thousand, two hundred twenty-three".