289884906 has 96 divisors (see below), whose sum is σ = 684343296. Its totient is φ = 91854000.

The previous prime is 289884863. The next prime is 289884911. The reversal of 289884906 is 609488982.

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

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, 1069551 + ... + 1069821.

It is an arithmetic number, because the mean of its divisors is an integer number (7128576).

Almost surely, 2^289884906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289884906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342171648).

289884906 is an abundant number, since it is smaller than the sum of its proper divisors (394458390).

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

289884906 is a wasteful number, since it uses less digits than its factorization.

289884906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 289884906 is about 17026.0067543743. The cubic root of 289884906 is about 661.8230177699.

The spelling of 289884906 in words is "two hundred eighty-nine million, eight hundred eighty-four thousand, nine hundred six".