28288712 has 16 divisors (see below), whose sum is σ = 55347840. Its totient is φ = 13529296.

The previous prime is 28288703. The next prime is 28288747. The reversal of 28288712 is 21788282.

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, 76688 + ... + 77055.

It is an arithmetic number, because the mean of its divisors is an integer number (3459240).

Almost surely, 2^28288712 is an apocalyptic number.

It is an amenable number.

28288712 is a deficient number, since it is larger than the sum of its proper divisors (27059128).

28288712 is a wasteful number, since it uses less digits than its factorization.

28288712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153772 (or 153768 counting only the distinct ones).

The product of its digits is 28672, while the sum is 38.

The square root of 28288712 is about 5318.7133782523. The cubic root of 28288712 is about 304.6990204734.

The spelling of 28288712 in words is "twenty-eight million, two hundred eighty-eight thousand, seven hundred twelve".