289123129980 has 288 divisors, whose sum is σ = 962448334848. Its totient is φ = 69937920000.

The previous prime is 289123129973. The next prime is 289123130029. The reversal of 289123129980 is 89921321982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23803789 + ... + 23815931.

It is an arithmetic number, because the mean of its divisors is an integer number (3341834496).

Almost surely, 2^289123129980 is an apocalyptic number.

289123129980 is a gapful number since it is divisible by the number (20) 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 289123129980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481224167424).

289123129980 is an abundant number, since it is smaller than the sum of its proper divisors (673325204868).

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

289123129980 is a wasteful number, since it uses less digits than its factorization.

289123129980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12457 (or 12452 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 289123129980 in words is "two hundred eighty-nine billion, one hundred twenty-three million, one hundred twenty-nine thousand, nine hundred eighty".