28072873136 has 60 divisors (see below), whose sum is σ = 68326158096. Its totient is φ = 10937477760.

The previous prime is 28072873099. The next prime is 28072873151. The reversal of 28072873136 is 63137827082.

It is a super-2 number, since 2×28072873136² (a number of 22 digits) contains 22 as substring.

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, 1022195 + ... + 1049298.

Almost surely, 2^28072873136 is an apocalyptic number.

It is an amenable number.

28072873136 is an abundant number, since it is smaller than the sum of its proper divisors (40253284960).

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

28072873136 is a wasteful number, since it uses less digits than its factorization.

28072873136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071530 (or 2071513 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 28072873136 in words is "twenty-eight billion, seventy-two million, eight hundred seventy-three thousand, one hundred thirty-six".