28981546650 has 144 divisors (see below), whose sum is σ = 89440775424. Its totient is φ = 6590586240.

The previous prime is 28981546609. The next prime is 28981546661. The reversal of 28981546650 is 5664518982.

28981546650 is a `hidden beast` number, since 2 + 8 + 98 + 1 + 546 + 6 + 5 + 0 = 666.

It is a super-2 number, since 2×28981546650² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 597199 + ... + 643901.

It is an arithmetic number, because the mean of its divisors is an integer number (621116496).

Almost surely, 2^28981546650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28981546650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44720387712).

28981546650 is an abundant number, since it is smaller than the sum of its proper divisors (60459228774).

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

28981546650 is a wasteful number, since it uses less digits than its factorization.

28981546650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46925 (or 46917 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 28981546650 in words is "twenty-eight billion, nine hundred eighty-one million, five hundred forty-six thousand, six hundred fifty".