386749989 has 12 divisors (see below), whose sum is σ = 559977600. Its totient is φ = 257215464.

The previous prime is 386749973. The next prime is 386750027. The reversal of 386749989 is 989947683.

386749989 is a `hidden beast` number, since 3 + 8 + 67 + 499 + 89 = 666.

It is not a de Polignac number, because 386749989 - 2⁴ = 386749973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386749939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47509 + ... + 55050.

It is an arithmetic number, because the mean of its divisors is an integer number (46664800).

Almost surely, 2^386749989 is an apocalyptic number.

It is an amenable number.

386749989 is a deficient number, since it is larger than the sum of its proper divisors (173227611).

386749989 is a wasteful number, since it uses less digits than its factorization.

386749989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102984 (or 102981 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 386749989 is about 19665.9601596261. The cubic root of 386749989 is about 728.5792024710.

The spelling of 386749989 in words is "three hundred eighty-six million, seven hundred forty-nine thousand, nine hundred eighty-nine".