289904065 has 32 divisors (see below), whose sum is σ = 398952576. Its totient is φ = 200309760.

The previous prime is 289904059. The next prime is 289904093. The reversal of 289904065 is 560409982.

It is not a de Polignac number, because 289904065 - 2³ = 289904057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 31 ways as a sum of consecutive naturals, for example, 85849 + ... + 89161.

It is an arithmetic number, because the mean of its divisors is an integer number (12467268).

Almost surely, 2^289904065 is an apocalyptic number.

It is an amenable number.

289904065 is a deficient number, since it is larger than the sum of its proper divisors (109048511).

289904065 is a wasteful number, since it uses less digits than its factorization.

289904065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 289904065 is about 17026.5693843475. The cubic root of 289904065 is about 661.8375977953.

The spelling of 289904065 in words is "two hundred eighty-nine million, nine hundred four thousand, sixty-five".