289738989 has 24 divisors (see below), whose sum is σ = 432886272. Its totient is φ = 186550560.

The previous prime is 289738979. The next prime is 289739011. The reversal of 289738989 is 989837982.

It is not a de Polignac number, because 289738989 - 2¹⁶ = 289673453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289738909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221712 + ... + 223014.

It is an arithmetic number, because the mean of its divisors is an integer number (18036928).

Almost surely, 2^289738989 is an apocalyptic number.

It is an amenable number.

289738989 is a deficient number, since it is larger than the sum of its proper divisors (143147283).

289738989 is a wasteful number, since it uses less digits than its factorization.

289738989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137 (or 2134 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The square root of 289738989 is about 17021.7210939435. The cubic root of 289738989 is about 661.7119536484.

The spelling of 289738989 in words is "two hundred eighty-nine million, seven hundred thirty-eight thousand, nine hundred eighty-nine".