28947686850 has 120 divisors (see below), whose sum is σ = 83026614528. Its totient is φ = 7470338400.

The previous prime is 28947686849. The next prime is 28947686851. The reversal of 28947686850 is 5868674982.

28947686850 is a `hidden beast` number, since 2 + 8 + 9 + 476 + 86 + 85 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28947686849) and next prime (28947686851).

It is not an unprimeable number, because it can be changed into a prime (28947686851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 10267 + ... + 240833.

Almost surely, 2^28947686850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28947686850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41513307264).

28947686850 is an abundant number, since it is smaller than the sum of its proper divisors (54078927678).

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

28947686850 is a wasteful number, since it uses less digits than its factorization.

28947686850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230622 (or 230608 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 28947686850 in words is "twenty-eight billion, nine hundred forty-seven million, six hundred eighty-six thousand, eight hundred fifty".