28051340856 has 192 divisors, whose sum is σ = 90123840000. Its totient is φ = 7193571840.

The previous prime is 28051340851. The next prime is 28051340887. The reversal of 28051340856 is 65804315082.

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 (28051340851) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1008220 + ... + 1035668.

It is an arithmetic number, because the mean of its divisors is an integer number (469395000).

Almost surely, 2^28051340856 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 28051340856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45061920000).

28051340856 is an abundant number, since it is smaller than the sum of its proper divisors (62072499144).

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

28051340856 is a wasteful number, since it uses less digits than its factorization.

28051340856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27562 (or 27551 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 28051340856 in words is "twenty-eight billion, fifty-one million, three hundred forty thousand, eight hundred fifty-six".