28135622856 has 32 divisors (see below), whose sum is σ = 76733517600. Its totient is φ = 8525946240.

The previous prime is 28135622819. The next prime is 28135622887. The reversal of 28135622856 is 65822653182.

It is a super-2 number, since 2×28135622856² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53286901 + ... + 53287428.

It is an arithmetic number, because the mean of its divisors is an integer number (2397922425).

Almost surely, 2^28135622856 is an apocalyptic number.

It is an amenable number.

28135622856 is an abundant number, since it is smaller than the sum of its proper divisors (48597894744).

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

28135622856 is a wasteful number, since it uses less digits than its factorization.

28135622856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106574349 (or 106574345 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 48.

The spelling of 28135622856 in words is "twenty-eight billion, one hundred thirty-five million, six hundred twenty-two thousand, eight hundred fifty-six".