28803656 has 32 divisors (see below), whose sum is σ = 62475840. Its totient is φ = 12193728.

The previous prime is 28803611. The next prime is 28803667. The reversal of 28803656 is 65630882.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550 + ... + 7746.

It is an arithmetic number, because the mean of its divisors is an integer number (1952370).

Almost surely, 2^28803656 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 28803656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31237920).

28803656 is an abundant number, since it is smaller than the sum of its proper divisors (33672184).

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

28803656 is a wasteful number, since it uses less digits than its factorization.

28803656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6293 (or 6289 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 28803656 is about 5366.9037628786. The cubic root of 28803656 is about 306.5367429053.

The spelling of 28803656 in words is "twenty-eight million, eight hundred three thousand, six hundred fifty-six".