389921356 has 24 divisors (see below), whose sum is σ = 770066640. Its totient is φ = 171124800.

The previous prime is 389921351. The next prime is 389921393. The reversal of 389921356 is 653129983.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (389921351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151515 + ... + 154066.

It is an arithmetic number, because the mean of its divisors is an integer number (32086110).

Almost surely, 2^389921356 is an apocalyptic number.

It is an amenable number.

389921356 is a deficient number, since it is larger than the sum of its proper divisors (380145284).

389921356 is a wasteful number, since it uses less digits than its factorization.

389921356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305625 (or 305623 counting only the distinct ones).

The product of its digits is 349920, while the sum is 46.

The square root of 389921356 is about 19746.4264108724. The cubic root of 389921356 is about 730.5652443309.

The spelling of 389921356 in words is "three hundred eighty-nine million, nine hundred twenty-one thousand, three hundred fifty-six".