289506680 has 32 divisors (see below), whose sum is σ = 652730400. Its totient is φ = 115564416.

The previous prime is 289506653. The next prime is 289506683. The reversal of 289506680 is 86605982.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289506683) 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, 12926 + ... + 27314.

It is an arithmetic number, because the mean of its divisors is an integer number (20397825).

Almost surely, 2^289506680 is an apocalyptic number.

289506680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289506680 is an abundant number, since it is smaller than the sum of its proper divisors (363223720).

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

289506680 is a wasteful number, since it uses less digits than its factorization.

289506680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14903 (or 14899 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 289506680 is about 17014.8958268924. The cubic root of 289506680 is about 661.5350556466.

The spelling of 289506680 in words is "two hundred eighty-nine million, five hundred six thousand, six hundred eighty".