28036656 has 60 divisors (see below), whose sum is σ = 79204008. Its totient is φ = 9257472.

The previous prime is 28036643. The next prime is 28036667. The reversal of 28036656 is 65663082.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28036656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15411 + ... + 17133.

Almost surely, 2^28036656 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 28036656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39602004).

28036656 is an abundant number, since it is smaller than the sum of its proper divisors (51167352).

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

28036656 is a wasteful number, since it uses less digits than its factorization.

28036656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850 (or 1841 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 28036656 is about 5294.9651556927. The cubic root of 28036656 is about 303.7913503631.

The spelling of 28036656 in words is "twenty-eight million, thirty-six thousand, six hundred fifty-six".