393924996399 has 16 divisors (see below), whose sum is σ = 572995779840. Its totient is φ = 238736602560.

The previous prime is 393924996373. The next prime is 393924996401. The reversal of 393924996399 is 993699429393.

It is not a de Polignac number, because 393924996399 - 2²¹ = 393922899247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 393924996399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393924996599) 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, 1509982 + ... + 1751540.

It is an arithmetic number, because the mean of its divisors is an integer number (35812236240).

Almost surely, 2^393924996399 is an apocalyptic number.

393924996399 is a deficient number, since it is larger than the sum of its proper divisors (179070783441).

393924996399 is a wasteful number, since it uses less digits than its factorization.

393924996399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290990.

The product of its digits is 688747536, while the sum is 75.

The spelling of 393924996399 in words is "three hundred ninety-three billion, nine hundred twenty-four million, nine hundred ninety-six thousand, three hundred ninety-nine".