389981761 has 8 divisors (see below), whose sum is σ = 420667520. Its totient is φ = 359394192.

The previous prime is 389981719. The next prime is 389981773. The reversal of 389981761 is 167189983.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 389981761 - 2⁷ = 389981633 is a prime.

It is a super-2 number, since 2×389981761² = 304171547825322242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 389981699 and 389981708.

It is not an unprimeable number, because it can be changed into a prime (389987761) 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, 16185 + ... + 32278.

It is an arithmetic number, because the mean of its divisors is an integer number (52583440).

Almost surely, 2^389981761 is an apocalyptic number.

It is an amenable number.

389981761 is a deficient number, since it is larger than the sum of its proper divisors (30685759).

389981761 is a wasteful number, since it uses less digits than its factorization.

389981761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49095.

The product of its digits is 653184, while the sum is 52.

The square root of 389981761 is about 19747.9558688994. The cubic root of 389981761 is about 730.6029677627.

The spelling of 389981761 in words is "three hundred eighty-nine million, nine hundred eighty-one thousand, seven hundred sixty-one".