289689912 has 64 divisors (see below), whose sum is σ = 808980000. Its totient is φ = 96049152.

The previous prime is 289689901. The next prime is 289689913. The reversal of 289689912 is 219986982.

It is a super-2 number, since 2×289689912² = 167840490229135488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289689913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38214 + ... + 45162.

Almost surely, 2^289689912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289689912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404490000).

289689912 is an abundant number, since it is smaller than the sum of its proper divisors (519290088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

289689912 is a wasteful number, since it uses less digits than its factorization.

289689912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7157 (or 7147 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 289689912 is about 17020.2794336638. The cubic root of 289689912 is about 661.6745905129.

The spelling of 289689912 in words is "two hundred eighty-nine million, six hundred eighty-nine thousand, nine hundred twelve".