28080280756 has 72 divisors (see below), whose sum is σ = 57205108800. Its totient is φ = 12026277120.

The previous prime is 28080280729. The next prime is 28080280769. The reversal of 28080280756 is 65708208082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

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 23 ways as a sum of consecutive naturals, for example, 727020 + ... + 764668.

It is an arithmetic number, because the mean of its divisors is an integer number (794515400).

Almost surely, 2^28080280756 is an apocalyptic number.

It is an amenable number.

28080280756 is an abundant number, since it is smaller than the sum of its proper divisors (29124828044).

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

28080280756 is a wasteful number, since it uses less digits than its factorization.

28080280756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37765 (or 37752 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 46.

The spelling of 28080280756 in words is "twenty-eight billion, eighty million, two hundred eighty thousand, seven hundred fifty-six".