28547902656 has 448 divisors, whose sum is σ = 104788776960. Its totient is φ = 7420170240.

The previous prime is 28547902637. The next prime is 28547902679. The reversal of 28547902656 is 65620974582.

28547902656 is a `hidden beast` number, since 2 + 8 + 547 + 90 + 2 + 6 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11163330 + ... + 11165886.

It is an arithmetic number, because the mean of its divisors is an integer number (233903520).

Almost surely, 2^28547902656 is an apocalyptic number.

28547902656 is a gapful number since it is divisible by the number (26) 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 28547902656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52394388480).

28547902656 is an abundant number, since it is smaller than the sum of its proper divisors (76240874304).

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

28547902656 is a wasteful number, since it uses less digits than its factorization.

28547902656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669 (or 2653 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 28547902656 in words is "twenty-eight billion, five hundred forty-seven million, nine hundred two thousand, six hundred fifty-six".