28425388800 has 216 divisors, whose sum is σ = 94493465920. Its totient is φ = 7524864000.

The previous prime is 28425388777. The next prime is 28425388853. The reversal of 28425388800 is 888352482.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28425388800.

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, 2663475 + ... + 2674125.

Almost surely, 2^28425388800 is an apocalyptic number.

28425388800 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 28425388800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47246732960).

28425388800 is an abundant number, since it is smaller than the sum of its proper divisors (66068077120).

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

28425388800 is a wasteful number, since it uses less digits than its factorization.

28425388800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10819 (or 10800 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 48.

The spelling of 28425388800 in words is "twenty-eight billion, four hundred twenty-five million, three hundred eighty-eight thousand, eight hundred".