289995556 has 24 divisors (see below), whose sum is σ = 534864960. Its totient is φ = 137196000.

The previous prime is 289995547. The next prime is 289995557. The reversal of 289995556 is 655599982.

It is a self number, because there is not a number n which added to its sum of digits gives 289995556.

It is not an unprimeable number, because it can be changed into a prime (289995557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76506 + ... + 80206.

It is an arithmetic number, because the mean of its divisors is an integer number (22286040).

Almost surely, 2^289995556 is an apocalyptic number.

It is an amenable number.

289995556 is a deficient number, since it is larger than the sum of its proper divisors (244869404).

289995556 is a wasteful number, since it uses less digits than its factorization.

289995556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755 (or 4753 counting only the distinct ones).

The product of its digits is 8748000, while the sum is 58.

The square root of 289995556 is about 17029.2558850937. The cubic root of 289995556 is about 661.9072137156.

The spelling of 289995556 in words is "two hundred eighty-nine million, nine hundred ninety-five thousand, five hundred fifty-six".