289884420 has 144 divisors (see below), whose sum is σ = 1042274688. Its totient is φ = 66251520.

The previous prime is 289884337. The next prime is 289884449. The reversal of 289884420 is 24488982.

It is a happy number.

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 47 ways as a sum of consecutive naturals, for example, 29760 + ... + 38280.

Almost surely, 2^289884420 is an apocalyptic number.

289884420 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 289884420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521137344).

289884420 is an abundant number, since it is smaller than the sum of its proper divisors (752390268).

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

289884420 is a wasteful number, since it uses less digits than its factorization.

289884420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8552 (or 8538 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The square root of 289884420 is about 17025.9924820846. The cubic root of 289884420 is about 661.8226479149.

The spelling of 289884420 in words is "two hundred eighty-nine million, eight hundred eighty-four thousand, four hundred twenty".