389021976 has 144 divisors (see below), whose sum is σ = 1265509440. Its totient is φ = 107533440.

The previous prime is 389021957. The next prime is 389022001. The reversal of 389021976 is 679120983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 107590 + ... + 111146.

It is an arithmetic number, because the mean of its divisors is an integer number (8788260).

Almost surely, 2^389021976 is an apocalyptic number.

389021976 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389021976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (632754720).

389021976 is an abundant number, since it is smaller than the sum of its proper divisors (876487464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389021976 is a wasteful number, since it uses less digits than its factorization.

389021976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614 (or 3600 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 389021976 is about 19723.6400291630. The cubic root of 389021976 is about 730.0031125157.

The spelling of 389021976 in words is "three hundred eighty-nine million, twenty-one thousand, nine hundred seventy-six".