389623857 has 8 divisors (see below), whose sum is σ = 593712576. Its totient is φ = 222642192.

The previous prime is 389623783. The next prime is 389623939. The reversal of 389623857 is 758326983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-389623857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389623457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9276738 + ... + 9276779.

It is an arithmetic number, because the mean of its divisors is an integer number (74214072).

Almost surely, 2^389623857 is an apocalyptic number.

It is an amenable number.

389623857 is a deficient number, since it is larger than the sum of its proper divisors (204088719).

389623857 is a wasteful number, since it uses less digits than its factorization.

389623857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18553527.

The product of its digits is 2177280, while the sum is 51.

The square root of 389623857 is about 19738.8919901802. The cubic root of 389623857 is about 730.3793968302.

The spelling of 389623857 in words is "three hundred eighty-nine million, six hundred twenty-three thousand, eight hundred fifty-seven".