289691368 has 8 divisors (see below), whose sum is σ = 543171330. Its totient is φ = 144845680.

The previous prime is 289691359. The next prime is 289691377. The reversal of 289691368 is 863196982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (289691359) and next prime (289691377).

It can be written as a sum of positive squares in only one way, i.e., 282172804 + 7518564 = 16798^2 + 2742^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×289691368² = 167842177387422848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18105703 + ... + 18105718.

Almost surely, 2^289691368 is an apocalyptic number.

It is an amenable number.

289691368 is a deficient number, since it is larger than the sum of its proper divisors (253479962).

289691368 is a wasteful number, since it uses less digits than its factorization.

289691368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36211427 (or 36211423 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 52.

The square root of 289691368 is about 17020.3222061158. The cubic root of 289691368 is about 661.6756990507.

The spelling of 289691368 in words is "two hundred eighty-nine million, six hundred ninety-one thousand, three hundred sixty-eight".