289791972 has 24 divisors (see below), whose sum is σ = 751312800. Its totient is φ = 96597288.

The previous prime is 289791941. The next prime is 289792021. The reversal of 289791972 is 279197982.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341522 + ... + 1341737.

It is an arithmetic number, because the mean of its divisors is an integer number (31304700).

Almost surely, 2^289791972 is an apocalyptic number.

It is an amenable number.

289791972 is an abundant number, since it is smaller than the sum of its proper divisors (461520828).

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

289791972 is a wasteful number, since it uses less digits than its factorization.

289791972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683272 (or 2683264 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 289791972 is about 17023.2773577828. The cubic root of 289791972 is about 661.7522857507.

The spelling of 289791972 in words is "two hundred eighty-nine million, seven hundred ninety-one thousand, nine hundred seventy-two".