289870224 has 80 divisors (see below), whose sum is σ = 875753472. Its totient is φ = 80889984.

The previous prime is 289870223. The next prime is 289870237. The reversal of 289870224 is 422078982.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (289870223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4417 + ... + 24479.

Almost surely, 2^289870224 is an apocalyptic number.

289870224 is a gapful number since it is divisible by the number (24) 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 289870224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437876736).

289870224 is an abundant number, since it is smaller than the sum of its proper divisors (585883248).

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

289870224 is a wasteful number, since it uses less digits than its factorization.

289870224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20124 (or 20118 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 289870224 is about 17025.5755849839. The cubic root of 289870224 is about 661.8118443129.

The spelling of 289870224 in words is "two hundred eighty-nine million, eight hundred seventy thousand, two hundred twenty-four".