289870280 has 96 divisors (see below), whose sum is σ = 769746240. Its totient is φ = 97937280.

The previous prime is 289870277. The next prime is 289870297. The reversal of 289870280 is 82078982.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138119 + ... + 140201.

It is an arithmetic number, because the mean of its divisors is an integer number (8018190).

Almost surely, 2^289870280 is an apocalyptic number.

289870280 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 289870280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384873120).

289870280 is an abundant number, since it is smaller than the sum of its proper divisors (479875960).

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

289870280 is a wasteful number, since it uses less digits than its factorization.

289870280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179 (or 2168 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 289870280 is about 17025.5772295685. The cubic root of 289870280 is about 661.8118869313.

The spelling of 289870280 in words is "two hundred eighty-nine million, eight hundred seventy thousand, two hundred eighty".