28885716 has 36 divisors (see below), whose sum is σ = 73405332. Its totient is φ = 9577344.

The previous prime is 28885699. The next prime is 28885721. The reversal of 28885716 is 61758882.

It can be written as a sum of positive squares in 2 ways, for example, as 17189316 + 11696400 = 4146^2 + 3420^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5056 + ... + 9128.

It is an arithmetic number, because the mean of its divisors is an integer number (2039037).

Almost surely, 2^28885716 is an apocalyptic number.

It is an amenable number.

28885716 is an abundant number, since it is smaller than the sum of its proper divisors (44519616).

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

28885716 is a wasteful number, since it uses less digits than its factorization.

28885716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280 (or 4275 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 28885716 is about 5374.5433294374. The cubic root of 28885716 is about 306.8275688920.

The spelling of 28885716 in words is "twenty-eight million, eight hundred eighty-five thousand, seven hundred sixteen".