289896618 has 64 divisors (see below), whose sum is σ = 650073600. Its totient is φ = 85440960.

The previous prime is 289896617. The next prime is 289896643. The reversal of 289896618 is 816698982.

It is a Curzon number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (289896613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 424105 + ... + 424787.

It is an arithmetic number, because the mean of its divisors is an integer number (10157400).

Almost surely, 2^289896618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289896618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325036800).

289896618 is an abundant number, since it is smaller than the sum of its proper divisors (360176982).

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

289896618 is a wasteful number, since it uses less digits than its factorization.

289896618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867.

The product of its digits is 2985984, while the sum is 57.

The square root of 289896618 is about 17026.3506953193. The cubic root of 289896618 is about 661.8319306943.

The spelling of 289896618 in words is "two hundred eighty-nine million, eight hundred ninety-six thousand, six hundred eighteen".