289012728 has 16 divisors (see below), whose sum is σ = 722531880. Its totient is φ = 96337568.

The previous prime is 289012697. The next prime is 289012777. The reversal of 289012728 is 827210982.

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, 6021075 + ... + 6021122.

Almost surely, 2^289012728 is an apocalyptic number.

It is an amenable number.

289012728 is an abundant number, since it is smaller than the sum of its proper divisors (433519152).

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

289012728 is a wasteful number, since it uses less digits than its factorization.

289012728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12042206 (or 12042202 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 289012728 is about 17000.3743488195. The cubic root of 289012728 is about 661.1586077047.

The spelling of 289012728 in words is "two hundred eighty-nine million, twelve thousand, seven hundred twenty-eight".