289891745 has 32 divisors (see below), whose sum is σ = 410296320. Its totient is φ = 193847040.

The previous prime is 289891741. The next prime is 289891799. The reversal of 289891745 is 547198982.

It is not a de Polignac number, because 289891745 - 2² = 289891741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289891741) 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 31 ways as a sum of consecutive naturals, for example, 226016 + ... + 227294.

It is an arithmetic number, because the mean of its divisors is an integer number (12821760).

Almost surely, 2^289891745 is an apocalyptic number.

It is an amenable number.

289891745 is a deficient number, since it is larger than the sum of its proper divisors (120404575).

289891745 is a wasteful number, since it uses less digits than its factorization.

289891745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625.

The product of its digits is 1451520, while the sum is 53.

The square root of 289891745 is about 17026.2075930020. The cubic root of 289891745 is about 661.8282223320.

The spelling of 289891745 in words is "two hundred eighty-nine million, eight hundred ninety-one thousand, seven hundred forty-five".