389921554 has 16 divisors (see below), whose sum is σ = 675586656. Its totient is φ = 166811200.

The previous prime is 389921551. The next prime is 389921561. The reversal of 389921554 is 455129983.

It is not an unprimeable number, because it can be changed into a prime (389921551) 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, 520912 + ... + 521659.

It is an arithmetic number, because the mean of its divisors is an integer number (42224166).

Almost surely, 2^389921554 is an apocalyptic number.

389921554 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

389921554 is a deficient number, since it is larger than the sum of its proper divisors (285665102).

389921554 is a wasteful number, since it uses less digits than its factorization.

389921554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042601.

The product of its digits is 388800, while the sum is 46.

The square root of 389921554 is about 19746.4314244372. The cubic root of 389921554 is about 730.5653679900.

The spelling of 389921554 in words is "three hundred eighty-nine million, nine hundred twenty-one thousand, five hundred fifty-four".