28196597856 has 192 divisors, whose sum is σ = 85688064000. Its totient is φ = 7952173056.

The previous prime is 28196597839. The next prime is 28196597857. The reversal of 28196597856 is 65879569182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28196597857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25563001 + ... + 25564103.

It is an arithmetic number, because the mean of its divisors is an integer number (446292000).

Almost surely, 2^28196597856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28196597856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42844032000).

28196597856 is an abundant number, since it is smaller than the sum of its proper divisors (57491466144).

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

28196597856 is a wasteful number, since it uses less digits than its factorization.

28196597856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581 (or 1573 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 66.

The spelling of 28196597856 in words is "twenty-eight billion, one hundred ninety-six million, five hundred ninety-seven thousand, eight hundred fifty-six".