28571508816 has 40 divisors (see below), whose sum is σ = 75202374240. Its totient is φ = 9344140416.

The previous prime is 28571508811. The next prime is 28571508827. The reversal of 28571508816 is 61880517582.

It is a super-2 number, since 2×28571508816² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28571508811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5612926 + ... + 5618013.

It is an arithmetic number, because the mean of its divisors is an integer number (1880059356).

Almost surely, 2^28571508816 is an apocalyptic number.

It is an amenable number.

28571508816 is an abundant number, since it is smaller than the sum of its proper divisors (46630865424).

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

28571508816 is a wasteful number, since it uses less digits than its factorization.

28571508816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11231003 (or 11230997 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 51.

The spelling of 28571508816 in words is "twenty-eight billion, five hundred seventy-one million, five hundred eight thousand, eight hundred sixteen".