393728423 has 8 divisors (see below), whose sum is σ = 432368256. Its totient is φ = 355563000.

The previous prime is 393728411. The next prime is 393728479. The reversal of 393728423 is 324827393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 393728423 - 2⁴ = 393728407 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 (393728123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116861 + ... + 120182.

It is an arithmetic number, because the mean of its divisors is an integer number (54046032).

Almost surely, 2^393728423 is an apocalyptic number.

393728423 is a deficient number, since it is larger than the sum of its proper divisors (38639833).

393728423 is a wasteful number, since it uses less digits than its factorization.

393728423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237205.

The product of its digits is 217728, while the sum is 41.

The square root of 393728423 is about 19842.5911362402. The cubic root of 393728423 is about 732.9352159770.

The spelling of 393728423 in words is "three hundred ninety-three million, seven hundred twenty-eight thousand, four hundred twenty-three".