289521216 has 70 divisors (see below), whose sum is σ = 858246950. Its totient is φ = 96505344.

The previous prime is 289521191. The next prime is 289521229. The reversal of 289521216 is 612125982.

It can be written as a sum of positive squares in only one way, i.e., 279023616 + 10497600 = 16704^2 + 3240^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 22741 + ... + 33108.

Almost surely, 2^289521216 is an apocalyptic number.

It is an amenable number.

289521216 is an abundant number, since it is smaller than the sum of its proper divisors (568725734).

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

289521216 is an equidigital number, since it uses as much as digits as its factorization.

289521216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55873 (or 55854 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 289521216 is about 17015.3229766584. The cubic root of 289521216 is about 661.5461272537.

The spelling of 289521216 in words is "two hundred eighty-nine million, five hundred twenty-one thousand, two hundred sixteen".