289823989 has 32 divisors (see below), whose sum is σ = 378685440. Its totient is φ = 215531712.

The previous prime is 289823983. The next prime is 289824011. The reversal of 289823989 is 989328982.

It is not a de Polignac number, because 289823989 - 2²³ = 281435381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289823983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122314 + ... + 124660.

It is an arithmetic number, because the mean of its divisors is an integer number (11833920).

Almost surely, 2^289823989 is an apocalyptic number.

It is an amenable number.

289823989 is a deficient number, since it is larger than the sum of its proper divisors (88861451).

289823989 is a wasteful number, since it uses less digits than its factorization.

289823989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449.

The product of its digits is 4478976, while the sum is 58.

The square root of 289823989 is about 17024.2177206473. The cubic root of 289823989 is about 661.7766555800.

The spelling of 289823989 in words is "two hundred eighty-nine million, eight hundred twenty-three thousand, nine hundred eighty-nine".