389949777 has 24 divisors (see below), whose sum is σ = 645671936. Its totient is φ = 222155136.

The previous prime is 389949761. The next prime is 389949827. The reversal of 389949777 is 777949983.

It is not a de Polignac number, because 389949777 - 2⁴ = 389949761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (389949727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12048 + ... + 30414.

Almost surely, 2^389949777 is an apocalyptic number.

It is an amenable number.

389949777 is a deficient number, since it is larger than the sum of its proper divisors (255722159).

389949777 is a wasteful number, since it uses less digits than its factorization.

389949777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18717 (or 18714 counting only the distinct ones).

The product of its digits is 24004512, while the sum is 63.

The square root of 389949777 is about 19747.1460469608. The cubic root of 389949777 is about 730.5829939703.

The spelling of 389949777 in words is "three hundred eighty-nine million, nine hundred forty-nine thousand, seven hundred seventy-seven".