289412728 has 16 divisors (see below), whose sum is σ = 591980760. Its totient is φ = 131551200.

The previous prime is 289412723. The next prime is 289412729. The reversal of 289412728 is 827214982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289412723) 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, 1644303 + ... + 1644478.

Almost surely, 2^289412728 is an apocalyptic number.

It is an amenable number.

289412728 is an abundant number, since it is smaller than the sum of its proper divisors (302568032).

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

289412728 is a wasteful number, since it uses less digits than its factorization.

289412728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288798 (or 3288794 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 289412728 is about 17012.1347278935. The cubic root of 289412728 is about 661.4634864678.

The spelling of 289412728 in words is "two hundred eighty-nine million, four hundred twelve thousand, seven hundred twenty-eight".