389924691 has 32 divisors (see below), whose sum is σ = 581602560. Its totient is φ = 230719104.

The previous prime is 389924677. The next prime is 389924713. The reversal of 389924691 is 196429983.

It is not a de Polignac number, because 389924691 - 2⁹ = 389924179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389924641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346656 + ... + 347778.

It is an arithmetic number, because the mean of its divisors is an integer number (18175080).

Almost surely, 2^389924691 is an apocalyptic number.

389924691 is a deficient number, since it is larger than the sum of its proper divisors (191677869).

389924691 is a wasteful number, since it uses less digits than its factorization.

389924691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475.

The product of its digits is 839808, while the sum is 51.

The square root of 389924691 is about 19746.5108563513. The cubic root of 389924691 is about 730.5673271682.

The spelling of 389924691 in words is "three hundred eighty-nine million, nine hundred twenty-four thousand, six hundred ninety-one".