289666540 has 12 divisors (see below), whose sum is σ = 608299776. Its totient is φ = 115866608.

The previous prime is 289666501. The next prime is 289666549. The reversal of 289666540 is 45666982.

It is not an unprimeable number, because it can be changed into a prime (289666549) 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, 7241644 + ... + 7241683.

It is an arithmetic number, because the mean of its divisors is an integer number (50691648).

Almost surely, 2^289666540 is an apocalyptic number.

289666540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289666540 is an abundant number, since it is smaller than the sum of its proper divisors (318633236).

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

289666540 is a wasteful number, since it uses less digits than its factorization.

289666540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14483336 (or 14483334 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 289666540 is about 17019.5928270920. The cubic root of 289666540 is about 661.6567955377.

The spelling of 289666540 in words is "two hundred eighty-nine million, six hundred sixty-six thousand, five hundred forty".