28300247820 has 576 divisors, whose sum is σ = 103187395584. Its totient is φ = 6210846720.

The previous prime is 28300247749. The next prime is 28300247821. The reversal of 28300247820 is 2874200382.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28300247821) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 65358324 + ... + 65358756.

It is an arithmetic number, because the mean of its divisors is an integer number (179144784).

Almost surely, 2^28300247820 is an apocalyptic number.

28300247820 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 28300247820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51593697792).

28300247820 is an abundant number, since it is smaller than the sum of its proper divisors (74887147764).

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

28300247820 is a wasteful number, since it uses less digits than its factorization.

28300247820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The spelling of 28300247820 in words is "twenty-eight billion, three hundred million, two hundred forty-seven thousand, eight hundred twenty".