28763656 has 16 divisors (see below), whose sum is σ = 54277740. Its totient is φ = 14289600.

The previous prime is 28763641. The next prime is 28763723. The reversal of 28763656 is 65636782.

It can be written as a sum of positive squares in 2 ways, for example, as 27394756 + 1368900 = 5234^2 + 1170^2 .

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, 10195 + ... + 12706.

Almost surely, 2^28763656 is an apocalyptic number.

It is an amenable number.

28763656 is a deficient number, since it is larger than the sum of its proper divisors (25514084).

28763656 is a wasteful number, since it uses less digits than its factorization.

28763656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23064 (or 23060 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The square root of 28763656 is about 5363.1759247670. The cubic root of 28763656 is about 306.3947800241.

The spelling of 28763656 in words is "twenty-eight million, seven hundred sixty-three thousand, six hundred fifty-six".