12699000028 has 144 divisors (see below), whose sum is σ = 28076896512. Its totient is φ = 4969536000.

The previous prime is 12699000023. The next prime is 12699000059. The reversal of 12699000028 is 82000099621.

12699000028 is a nontrivial binomial coefficient, being equal to C(159368, 2).

It is a super-2 number, since 2×12699000028² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12699000023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7011243 + ... + 7013053.

It is an arithmetic number, because the mean of its divisors is an integer number (194978448).

Almost surely, 2^12699000028 is an apocalyptic number.

12699000028 is the 159367-th triangular number and also the 79684-th hexagonal number.

12699000028 is the 53123-rd centered nonagonal number.

It is an amenable number.

12699000028 is an abundant number, since it is smaller than the sum of its proper divisors (15377896484).

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

12699000028 is a wasteful number, since it uses less digits than its factorization.

12699000028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916 (or 1901 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

Adding to 12699000028 its reverse (82000099621), we get a palindrome (94699099649).

The spelling of 12699000028 in words is "twelve billion, six hundred ninety-nine million, twenty-eight", and thus it is an aban number.