289691912 has 16 divisors (see below), whose sum is σ = 549717840. Its totient is φ = 143100496.

The previous prime is 289691911. The next prime is 289691971. The reversal of 289691912 is 219196982.

It is not an unprimeable number, because it can be changed into a prime (289691911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217478 + ... + 218805.

It is an arithmetic number, because the mean of its divisors is an integer number (34357365).

Almost surely, 2^289691912 is an apocalyptic number.

It is an amenable number.

289691912 is a deficient number, since it is larger than the sum of its proper divisors (260025928).

289691912 is a wasteful number, since it uses less digits than its factorization.

289691912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436372 (or 436368 counting only the distinct ones).

The product of its digits is 139968, while the sum is 47.

The square root of 289691912 is about 17020.3381870044. The cubic root of 289691912 is about 661.6761132287.

The spelling of 289691912 in words is "two hundred eighty-nine million, six hundred ninety-one thousand, nine hundred twelve".