289639212 has 12 divisors (see below), whose sum is σ = 675824856. Its totient is φ = 96546400.

The previous prime is 289639199. The next prime is 289639237. The reversal of 289639212 is 212936982.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12068289 + ... + 12068312.

It is an arithmetic number, because the mean of its divisors is an integer number (56318738).

Almost surely, 2^289639212 is an apocalyptic number.

It is an amenable number.

289639212 is an abundant number, since it is smaller than the sum of its proper divisors (386185644).

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

289639212 is a wasteful number, since it uses less digits than its factorization.

289639212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24136608 (or 24136606 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 289639212 is about 17018.7899687375. The cubic root of 289639212 is about 661.6359873289.

The spelling of 289639212 in words is "two hundred eighty-nine million, six hundred thirty-nine thousand, two hundred twelve".