28281733830 has 48 divisors (see below), whose sum is σ = 84037153824. Its totient is φ = 6464396160.

The previous prime is 28281733811. The next prime is 28281733847. The reversal of 28281733830 is 3833718282.

28281733830 is a `hidden beast` number, since 2 + 8 + 281 + 7 + 338 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22445191 + ... + 22446450.

It is an arithmetic number, because the mean of its divisors is an integer number (1750774038).

Almost surely, 2^28281733830 is an apocalyptic number.

28281733830 is an abundant number, since it is smaller than the sum of its proper divisors (55755419994).

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

28281733830 is a wasteful number, since it uses less digits than its factorization.

28281733830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44891661 (or 44891658 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 28281733830 in words is "twenty-eight billion, two hundred eighty-one million, seven hundred thirty-three thousand, eight hundred thirty".