289798656 has 80 divisors (see below), whose sum is σ = 882366144. Its totient is φ = 82796544.

The previous prime is 289798631. The next prime is 289798657. The reversal of 289798656 is 656897982.

It is a happy number.

It is a super-2 number, since 2×289798656² = 167966522038812672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 289798656.

It is not an unprimeable number, because it can be changed into a prime (289798657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2725 + ... + 24228.

Almost surely, 2^289798656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289798656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441183072).

289798656 is an abundant number, since it is smaller than the sum of its proper divisors (592567488).

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

289798656 is an equidigital number, since it uses as much as digits as its factorization.

289798656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26981 (or 26965 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The square root of 289798656 is about 17023.4736760745. The cubic root of 289798656 is about 661.7573734443.

The spelling of 289798656 in words is "two hundred eighty-nine million, seven hundred ninety-eight thousand, six hundred fifty-six".