27728587524 has 96 divisors (see below), whose sum is σ = 71034163200. Its totient is φ = 8348952960.

The previous prime is 27728587489. The next prime is 27728587531. The reversal of 27728587524 is 42578582772.

It is a super-2 number, since 2×27728587524² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15762957 + ... + 15764715.

It is an arithmetic number, because the mean of its divisors is an integer number (739939200).

Almost surely, 2^27728587524 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 27728587524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35517081600).

27728587524 is an abundant number, since it is smaller than the sum of its proper divisors (43305575676).

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

27728587524 is a wasteful number, since it uses less digits than its factorization.

27728587524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473 (or 2471 counting only the distinct ones).

The product of its digits is 17561600, while the sum is 57.

The spelling of 27728587524 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred eighty-seven thousand, five hundred twenty-four".