28663948680 has 64 divisors (see below), whose sum is σ = 86024816640. Its totient is φ = 7640788992.

The previous prime is 28663948679. The next prime is 28663948699. The reversal of 28663948680 is 8684936682.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 15 ways as a sum of consecutive naturals, for example, 277992 + ... + 366888.

It is an arithmetic number, because the mean of its divisors is an integer number (1344137760).

Almost surely, 2^28663948680 is an apocalyptic number.

28663948680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28663948680 is an abundant number, since it is smaller than the sum of its proper divisors (57360867960).

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

28663948680 is a wasteful number, since it uses less digits than its factorization.

28663948680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91598 (or 91594 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 60.

The spelling of 28663948680 in words is "twenty-eight billion, six hundred sixty-three million, nine hundred forty-eight thousand, six hundred eighty".