386798639 has 4 divisors (see below), whose sum is σ = 386851200. Its totient is φ = 386746080.

The previous prime is 386798627. The next prime is 386798641. The reversal of 386798639 is 936897683.

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 386798639 - 2¹² = 386794543 is a prime.

It is a super-2 number, since 2×386798639² = 299226374264504642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386798669) 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, 13007 + ... + 30704.

It is an arithmetic number, because the mean of its divisors is an integer number (96712800).

Almost surely, 2^386798639 is an apocalyptic number.

386798639 is a deficient number, since it is larger than the sum of its proper divisors (52561).

386798639 is an equidigital number, since it uses as much as digits as its factorization.

386798639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52560.

The product of its digits is 11757312, while the sum is 59.

The square root of 386798639 is about 19667.1970295719. The cubic root of 386798639 is about 728.6097509675.

The spelling of 386798639 in words is "three hundred eighty-six million, seven hundred ninety-eight thousand, six hundred thirty-nine".