289680307 has 8 divisors (see below), whose sum is σ = 337820000. Its totient is φ = 248297112.

The previous prime is 289680299. The next prime is 289680311. The reversal of 289680307 is 703086982.

It is not a de Polignac number, because 289680307 - 2³ = 289680299 is a prime.

It is a super-2 number, since 2×289680307² = 167829360527228498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (289680397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421932 + ... + 422617.

It is an arithmetic number, because the mean of its divisors is an integer number (42227500).

Almost surely, 2^289680307 is an apocalyptic number.

289680307 is the 9827-th hex number.

289680307 is a deficient number, since it is larger than the sum of its proper divisors (48139693).

289680307 is an frugal number, since it uses more digits than its factorization.

289680307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844570 (or 844556 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 289680307 is about 17019.9972679199. The cubic root of 289680307 is about 661.6672775731.

The spelling of 289680307 in words is "two hundred eighty-nine million, six hundred eighty thousand, three hundred seven".