389886931 has 8 divisors (see below), whose sum is σ = 445908320. Its totient is φ = 333946368.

The previous prime is 389886911. The next prime is 389886947. The reversal of 389886931 is 139688983.

It is a happy number.

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

It is not a de Polignac number, because 389886931 - 2⁷ = 389886803 is a prime.

It is a super-2 number, since 2×389886931² = 304023637929197522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389886911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9486 + ... + 29491.

It is an arithmetic number, because the mean of its divisors is an integer number (55738540).

Almost surely, 2^389886931 is an apocalyptic number.

389886931 is a deficient number, since it is larger than the sum of its proper divisors (56021389).

389886931 is a wasteful number, since it uses less digits than its factorization.

389886931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40413.

The product of its digits is 2239488, while the sum is 55.

The square root of 389886931 is about 19745.5547149225. The cubic root of 389886931 is about 730.5437438853.

The spelling of 389886931 in words is "three hundred eighty-nine million, eight hundred eighty-six thousand, nine hundred thirty-one".