28508712 has 16 divisors (see below), whose sum is σ = 71271840. Its totient is φ = 9502896.

The previous prime is 28508693. The next prime is 28508713. The reversal of 28508712 is 21780582.

It is not an unprimeable number, because it can be changed into a prime (28508713) 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, 593908 + ... + 593955.

It is an arithmetic number, because the mean of its divisors is an integer number (4454490).

Almost surely, 2^28508712 is an apocalyptic number.

It is an amenable number.

28508712 is an abundant number, since it is smaller than the sum of its proper divisors (42763128).

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

28508712 is a wasteful number, since it uses less digits than its factorization.

28508712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187872 (or 1187868 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 28508712 is about 5339.3550172282. The cubic root of 28508712 is about 305.4868583756.

The spelling of 28508712 in words is "twenty-eight million, five hundred eight thousand, seven hundred twelve".