289895220 has 192 divisors, whose sum is σ = 997194240. Its totient is φ = 69543936.

The previous prime is 289895189. The next prime is 289895257. The reversal of 289895220 is 22598982.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 210454 + ... + 211826.

It is an arithmetic number, because the mean of its divisors is an integer number (5193720).

Almost surely, 2^289895220 is an apocalyptic number.

289895220 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 289895220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498597120).

289895220 is an abundant number, since it is smaller than the sum of its proper divisors (707299020).

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

289895220 is a wasteful number, since it uses less digits than its factorization.

289895220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431 (or 1423 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 289895220 is about 17026.3096412581. The cubic root of 289895220 is about 661.8308668179.

The spelling of 289895220 in words is "two hundred eighty-nine million, eight hundred ninety-five thousand, two hundred twenty".