289090992 has 80 divisors (see below), whose sum is σ = 762451200. Its totient is φ = 94369536.

The previous prime is 289090981. The next prime is 289090993. The reversal of 289090992 is 299090982.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (289090993) 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, 593373 + ... + 593859.

It is an arithmetic number, because the mean of its divisors is an integer number (9530640).

Almost surely, 2^289090992 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 289090992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381225600).

289090992 is an abundant number, since it is smaller than the sum of its proper divisors (473360208).

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

289090992 is a wasteful number, since it uses less digits than its factorization.

289090992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 289090992 is about 17002.6760246733. The cubic root of 289090992 is about 661.2182824089.

The spelling of 289090992 in words is "two hundred eighty-nine million, ninety thousand, nine hundred ninety-two".