388730879 has 4 divisors (see below), whose sum is σ = 397771176. Its totient is φ = 379690584.

The previous prime is 388730863. The next prime is 388730929. The reversal of 388730879 is 978037883.

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 388730879 - 2⁴ = 388730863 is a prime.

It is a super-2 number, since 2×388730879² = 302223392576225282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 388730879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388730179) 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, 4520084 + ... + 4520169.

It is an arithmetic number, because the mean of its divisors is an integer number (99442794).

Almost surely, 2^388730879 is an apocalyptic number.

388730879 is a deficient number, since it is larger than the sum of its proper divisors (9040297).

388730879 is an equidigital number, since it uses as much as digits as its factorization.

388730879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9040296.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The square root of 388730879 is about 19716.2592547369. The cubic root of 388730879 is about 729.8209850655.

The spelling of 388730879 in words is "three hundred eighty-eight million, seven hundred thirty thousand, eight hundred seventy-nine".