289944684 has 72 divisors (see below), whose sum is σ = 763268688. Its totient is φ = 96240960.

The previous prime is 289944671. The next prime is 289944701. The reversal of 289944684 is 486449982.

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

It is a self number, because there is not a number n which added to its sum of digits gives 289944684.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 307654 + ... + 308594.

It is an arithmetic number, because the mean of its divisors is an integer number (10600954).

Almost surely, 2^289944684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289944684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381634344).

289944684 is an abundant number, since it is smaller than the sum of its proper divisors (473324004).

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

289944684 is a wasteful number, since it uses less digits than its factorization.

289944684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1263 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 289944684 is about 17027.7621547871. The cubic root of 289944684 is about 661.8685067857.

The spelling of 289944684 in words is "two hundred eighty-nine million, nine hundred forty-four thousand, six hundred eighty-four".