289728408 has 32 divisors (see below), whose sum is σ = 724838400. Its totient is φ = 96507168.

The previous prime is 289728407. The next prime is 289728421. The reversal of 289728408 is 804827982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289728407) 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, 38785 + ... + 45647.

It is an arithmetic number, because the mean of its divisors is an integer number (22651200).

Almost surely, 2^289728408 is an apocalyptic number.

It is an amenable number.

289728408 is an abundant number, since it is smaller than the sum of its proper divisors (435109992).

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

289728408 is a wasteful number, since it uses less digits than its factorization.

289728408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8631 (or 8627 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 289728408 is about 17021.4102823473. The cubic root of 289728408 is about 661.7038985141.

The spelling of 289728408 in words is "two hundred eighty-nine million, seven hundred twenty-eight thousand, four hundred eight".