289918872 has 128 divisors (see below), whose sum is σ = 868896000. Its totient is φ = 89268480.

The previous prime is 289918807. The next prime is 289918883. The reversal of 289918872 is 278819982.

289918872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167403 + ... + 169125.

It is an arithmetic number, because the mean of its divisors is an integer number (6788250).

Almost surely, 2^289918872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289918872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434448000).

289918872 is an abundant number, since it is smaller than the sum of its proper divisors (578977128).

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

289918872 is a wasteful number, since it uses less digits than its factorization.

289918872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798 (or 1788 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 289918872 is about 17027.0041992125. The cubic root of 289918872 is about 661.8488655026.

The spelling of 289918872 in words is "two hundred eighty-nine million, nine hundred eighteen thousand, eight hundred seventy-two".