28127040512 has 22 divisors (see below), whose sum is σ = 56226615258. Its totient is φ = 14063519744.

The previous prime is 28127040509. The next prime is 28127040517. The reversal of 28127040512 is 21504072182.

It can be written as a sum of positive squares in only one way, i.e., 25019646976 + 3107393536 = 158176^2 + 55744^2 .

It is a super-2 number, since 2×28127040512² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28127040517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13732883 + ... + 13734930.

It is an arithmetic number, because the mean of its divisors is an integer number (2555755239).

Almost surely, 2^28127040512 is an apocalyptic number.

It is an amenable number.

28127040512 is a deficient number, since it is larger than the sum of its proper divisors (28099574746).

28127040512 is an equidigital number, since it uses as much as digits as its factorization.

28127040512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27467833 (or 27467815 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 28127040512 in words is "twenty-eight billion, one hundred twenty-seven million, forty thousand, five hundred twelve".