28786963680 has 192 divisors, whose sum is σ = 104229115200. Its totient is φ = 7411783680.

The previous prime is 28786963613. The next prime is 28786963721. The reversal of 28786963680 is 8636968782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10390 + ... + 240170.

It is an arithmetic number, because the mean of its divisors is an integer number (542859975).

Almost surely, 2^28786963680 is an apocalyptic number.

28786963680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28786963680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52114557600).

28786963680 is an abundant number, since it is smaller than the sum of its proper divisors (75442151520).

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

28786963680 is a wasteful number, since it uses less digits than its factorization.

28786963680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229834 (or 229820 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 28786963680 in words is "twenty-eight billion, seven hundred eighty-six million, nine hundred sixty-three thousand, six hundred eighty".