390398336793 has 10 divisors (see below), whose sum is σ = 583187639034. Its totient is φ = 260265557808.

The previous prime is 390398336789. The next prime is 390398336831. The reversal of 390398336793 is 397633893093.

It can be written as a sum of positive squares in only one way, i.e., 208349341209 + 182048995584 = 456453^2 + 426672^2 .

It is not a de Polignac number, because 390398336793 - 2² = 390398336789 is a prime.

It is a super-2 number, since 2×390398336793² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 390398336793.

It is not an unprimeable number, because it can be changed into a prime (390398336743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2409866196 + ... + 2409866357.

Almost surely, 2^390398336793 is an apocalyptic number.

It is an amenable number.

390398336793 is a deficient number, since it is larger than the sum of its proper divisors (192789302241).

390398336793 is an equidigital number, since it uses as much as digits as its factorization.

390398336793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4819732565 (or 4819732556 counting only the distinct ones).

The product of its (nonzero) digits is 59521392, while the sum is 63.

The spelling of 390398336793 in words is "three hundred ninety billion, three hundred ninety-eight million, three hundred thirty-six thousand, seven hundred ninety-three".