289639115 has 16 divisors (see below), whose sum is σ = 384015168. Its totient is φ = 208598016.

The previous prime is 289639093. The next prime is 289639123. The reversal of 289639115 is 511936982.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 289639115 - 2²² = 285444811 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 72122 + ... + 76031.

It is an arithmetic number, because the mean of its divisors is an integer number (24000948).

Almost surely, 2^289639115 is an apocalyptic number.

289639115 is a deficient number, since it is larger than the sum of its proper divisors (94376053).

289639115 is a wasteful number, since it uses less digits than its factorization.

289639115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148198.

The product of its digits is 116640, while the sum is 44.

The square root of 289639115 is about 17018.7871189459. The cubic root of 289639115 is about 661.6359134684.

The spelling of 289639115 in words is "two hundred eighty-nine million, six hundred thirty-nine thousand, one hundred fifteen".