28743237208 has 64 divisors (see below), whose sum is σ = 63036691200. Its totient is φ = 12032392320.

The previous prime is 28743237197. The next prime is 28743237269. The reversal of 28743237208 is 80273234782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491023 + ... + 546433.

It is an arithmetic number, because the mean of its divisors is an integer number (984948300).

Almost surely, 2^28743237208 is an apocalyptic number.

28743237208 is a gapful number since it is divisible by the number (28) 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 28743237208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31518345600).

28743237208 is an abundant number, since it is smaller than the sum of its proper divisors (34293453992).

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

28743237208 is a wasteful number, since it uses less digits than its factorization.

28743237208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55640 (or 55636 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 28743237208 in words is "twenty-eight billion, seven hundred forty-three million, two hundred thirty-seven thousand, two hundred eight".