28006316856 has 384 divisors, whose sum is σ = 93558067200. Its totient is φ = 7396945920.

The previous prime is 28006316831. The next prime is 28006316881. The reversal of 28006316856 is 65861360082.

28006316856 is a `hidden beast` number, since 2 + 8 + 0 + 0 + 631 + 6 + 8 + 5 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (28006316831) and next prime (28006316881).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 51199575 + ... + 51200121.

It is an arithmetic number, because the mean of its divisors is an integer number (243640800).

Almost surely, 2^28006316856 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 28006316856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46779033600).

28006316856 is an abundant number, since it is smaller than the sum of its proper divisors (65551750344).

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

28006316856 is a wasteful number, since it uses less digits than its factorization.

28006316856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 28006316856 in words is "twenty-eight billion, six million, three hundred sixteen thousand, eight hundred fifty-six".