28643768 has 16 divisors (see below), whose sum is σ = 53947080. Its totient is φ = 14257888.

The previous prime is 28643761. The next prime is 28643801. The reversal of 28643768 is 86734682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28643761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6071 + ... + 9702.

Almost surely, 2^28643768 is an apocalyptic number.

It is an amenable number.

28643768 is a deficient number, since it is larger than the sum of its proper divisors (25303312).

28643768 is a wasteful number, since it uses less digits than its factorization.

28643768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16006 (or 16002 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 28643768 is about 5351.9872944543. The cubic root of 28643768 is about 305.9684989003.

The spelling of 28643768 in words is "twenty-eight million, six hundred forty-three thousand, seven hundred sixty-eight".