28215048784 has 80 divisors (see below), whose sum is σ = 64345881600. Its totient is φ = 11860899840.

The previous prime is 28215048749. The next prime is 28215048833. The reversal of 28215048784 is 48784051282.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19084 + ... + 238315.

It is an arithmetic number, because the mean of its divisors is an integer number (804323520).

Almost surely, 2^28215048784 is an apocalyptic number.

It is an amenable number.

28215048784 is an abundant number, since it is smaller than the sum of its proper divisors (36130832816).

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

28215048784 is a wasteful number, since it uses less digits than its factorization.

28215048784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257468 (or 257462 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 49.

The spelling of 28215048784 in words is "twenty-eight billion, two hundred fifteen million, forty-eight thousand, seven hundred eighty-four".