289187120 has 20 divisors (see below), whose sum is σ = 672360240. Its totient is φ = 115674816.

The previous prime is 289187113. The next prime is 289187123. The reversal of 289187120 is 21781982.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (289187123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1807340 + ... + 1807499.

It is an arithmetic number, because the mean of its divisors is an integer number (33618012).

Almost surely, 2^289187120 is an apocalyptic number.

289187120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289187120 is an abundant number, since it is smaller than the sum of its proper divisors (383173120).

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

289187120 is a wasteful number, since it uses less digits than its factorization.

289187120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614852 (or 3614846 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 289187120 is about 17005.5026388519. The cubic root of 289187120 is about 661.2915633124.

The spelling of 289187120 in words is "two hundred eighty-nine million, one hundred eighty-seven thousand, one hundred twenty".