389221929 has 20 divisors (see below), whose sum is σ = 589628160. Its totient is φ = 255822840.

The previous prime is 389221913. The next prime is 389221949. The reversal of 389221929 is 929122983.

It is a happy number.

It is not a de Polignac number, because 389221929 - 2⁴ = 389221913 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389221949) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28089 + ... + 39590.

It is an arithmetic number, because the mean of its divisors is an integer number (29481408).

Almost surely, 2^389221929 is an apocalyptic number.

It is an amenable number.

389221929 is a deficient number, since it is larger than the sum of its proper divisors (200406231).

389221929 is an equidigital number, since it uses as much as digits as its factorization.

389221929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67762 (or 67753 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 389221929 is about 19728.7082445861. The cubic root of 389221929 is about 730.1281622730.

The spelling of 389221929 in words is "three hundred eighty-nine million, two hundred twenty-one thousand, nine hundred twenty-nine".