28076722172 has 24 divisors (see below), whose sum is σ = 49494196752. Its totient is φ = 13935801600.

The previous prime is 28076722169. The next prime is 28076722279. The reversal of 28076722172 is 27122767082.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373172 + ... + 442052.

It is an arithmetic number, because the mean of its divisors is an integer number (2062258198).

Almost surely, 2^28076722172 is an apocalyptic number.

It is an amenable number.

28076722172 is a deficient number, since it is larger than the sum of its proper divisors (21417474580).

28076722172 is a wasteful number, since it uses less digits than its factorization.

28076722172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69629 (or 69627 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 44.

The spelling of 28076722172 in words is "twenty-eight billion, seventy-six million, seven hundred twenty-two thousand, one hundred seventy-two".