28273930272 has 72 divisors (see below), whose sum is σ = 91890279936. Its totient is φ = 8078265216.

The previous prime is 28273930259. The next prime is 28273930283. The reversal of 28273930272 is 27203937282.

28273930272 is a `hidden beast` number, since 2 + 8 + 273 + 9 + 302 + 72 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7010368 + ... + 7014399.

It is an arithmetic number, because the mean of its divisors is an integer number (1276253888).

Almost surely, 2^28273930272 is an apocalyptic number.

It is an amenable number.

28273930272 is an abundant number, since it is smaller than the sum of its proper divisors (63616349664).

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

28273930272 is a wasteful number, since it uses less digits than its factorization.

28273930272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14024790 (or 14024779 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 28273930272 in words is "twenty-eight billion, two hundred seventy-three million, nine hundred thirty thousand, two hundred seventy-two".