28016656 has 10 divisors (see below), whose sum is σ = 54282302. Its totient is φ = 14008320.

The previous prime is 28016633. The next prime is 28016657. The reversal of 28016656 is 65661082.

It can be written as a sum of positive squares in only one way, i.e., 27206656 + 810000 = 5216^2 + 900^2 .

It is not an unprimeable number, because it can be changed into a prime (28016657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 875505 + ... + 875536.

Almost surely, 2^28016656 is an apocalyptic number.

It is an amenable number.

28016656 is a deficient number, since it is larger than the sum of its proper divisors (26265646).

28016656 is a wasteful number, since it uses less digits than its factorization.

28016656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751049 (or 1751043 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 28016656 is about 5293.0762322113. The cubic root of 28016656 is about 303.7190964738.

The spelling of 28016656 in words is "twenty-eight million, sixteen thousand, six hundred fifty-six".