28208947200 has 504 divisors, whose sum is σ = 108615751272. Its totient is φ = 6440878080.

The previous prime is 28208947171. The next prime is 28208947201. The reversal of 28208947200 is 274980282.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28208947201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30105132 + ... + 30106068.

It is an arithmetic number, because the mean of its divisors is an integer number (215507443).

Almost surely, 2^28208947200 is an apocalyptic number.

28208947200 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 28208947200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54307875636).

28208947200 is an abundant number, since it is smaller than the sum of its proper divisors (80406804072).

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

28208947200 is an equidigital number, since it uses as much as digits as its factorization.

28208947200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 28208947200 in words is "twenty-eight billion, two hundred eight million, nine hundred forty-seven thousand, two hundred".