289995644 has 12 divisors (see below), whose sum is σ = 512517768. Its totient is φ = 143562000.

The previous prime is 289995637. The next prime is 289995683. The reversal of 289995644 is 446599982.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 289995644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358502 + ... + 359309.

It is an arithmetic number, because the mean of its divisors is an integer number (42709814).

Almost surely, 2^289995644 is an apocalyptic number.

It is an amenable number.

289995644 is a deficient number, since it is larger than the sum of its proper divisors (222522124).

289995644 is a wasteful number, since it uses less digits than its factorization.

289995644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717916 (or 717914 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 56.

The square root of 289995644 is about 17029.2584688823. The cubic root of 289995644 is about 661.9072806682.

It can be divided in two parts, 28999 and 5644, that added together give a palindrome (34643).

The spelling of 289995644 in words is "two hundred eighty-nine million, nine hundred ninety-five thousand, six hundred forty-four".