28667361312 has 72 divisors (see below), whose sum is σ = 81552285360. Its totient is φ = 9552332160.

The previous prime is 28667361311. The next prime is 28667361419. The reversal of 28667361312 is 21316376682.

28667361312 is a `hidden beast` number, since 28 + 6 + 6 + 7 + 3 + 613 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×28667361312² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28667361311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 852987 + ... + 885957.

It is an arithmetic number, because the mean of its divisors is an integer number (1132670630).

Almost surely, 2^28667361312 is an apocalyptic number.

It is an amenable number.

28667361312 is an abundant number, since it is smaller than the sum of its proper divisors (52884924048).

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

28667361312 is a wasteful number, since it uses less digits than its factorization.

28667361312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36006 (or 35995 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The spelling of 28667361312 in words is "twenty-eight billion, six hundred sixty-seven million, three hundred sixty-one thousand, three hundred twelve".