28772804720 has 80 divisors (see below), whose sum is σ = 75494855520. Its totient is φ = 10102041600.

The previous prime is 28772804713. The next prime is 28772804773. The reversal of 28772804720 is 2740827782.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538211 + ... + 589250.

It is an arithmetic number, because the mean of its divisors is an integer number (943685694).

Almost surely, 2^28772804720 is an apocalyptic number.

28772804720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28772804720 is an abundant number, since it is smaller than the sum of its proper divisors (46722050800).

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

28772804720 is a wasteful number, since it uses less digits than its factorization.

28772804720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127514 (or 1127508 counting only the distinct ones).

The product of its (nonzero) digits is 702464, while the sum is 47.

The spelling of 28772804720 in words is "twenty-eight billion, seven hundred seventy-two million, eight hundred four thousand, seven hundred twenty".