28056064 has 40 divisors (see below), whose sum is σ = 57611268. Its totient is φ = 13639680.

The previous prime is 28056047. The next prime is 28056071. The reversal of 28056064 is 46065082.

It can be written as a sum of positive squares in 2 ways, for example, as 27040000 + 1016064 = 5200^2 + 1008^2 .

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, 18204 + ... + 19684.

Almost surely, 2^28056064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28056064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28805634).

28056064 is an abundant number, since it is smaller than the sum of its proper divisors (29555204).

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

28056064 is an equidigital number, since it uses as much as digits as its factorization.

28056064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 28056064 is about 5296.7975230322. The cubic root of 28056064 is about 303.8614326936.

The spelling of 28056064 in words is "twenty-eight million, fifty-six thousand, sixty-four".