289889639 has 8 divisors (see below), whose sum is σ = 319803792. Its totient is φ = 261063360.

The previous prime is 289889609. The next prime is 289889651. The reversal of 289889639 is 936988982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289889639 - 2¹² = 289885543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289889609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271409 + ... + 272474.

It is an arithmetic number, because the mean of its divisors is an integer number (39975474).

Almost surely, 2^289889639 is an apocalyptic number.

289889639 is a deficient number, since it is larger than the sum of its proper divisors (29914153).

289889639 is a wasteful number, since it uses less digits than its factorization.

289889639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543937.

The product of its digits is 13436928, while the sum is 62.

The square root of 289889639 is about 17026.1457470562. The cubic root of 289889639 is about 661.8266196492.

The spelling of 289889639 in words is "two hundred eighty-nine million, eight hundred eighty-nine thousand, six hundred thirty-nine".