28724553924 has 96 divisors (see below), whose sum is σ = 74409172992. Its totient is φ = 8551920000.

The previous prime is 28724553919. The next prime is 28724553967. The reversal of 28724553924 is 42935542782.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1738269 + ... + 1754715.

It is an arithmetic number, because the mean of its divisors is an integer number (775095552).

Almost surely, 2^28724553924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28724553924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37204586496).

28724553924 is an abundant number, since it is smaller than the sum of its proper divisors (45684619068).

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

28724553924 is a wasteful number, since it uses less digits than its factorization.

28724553924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16697 (or 16695 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 51.

The spelling of 28724553924 in words is "twenty-eight billion, seven hundred twenty-four million, five hundred fifty-three thousand, nine hundred twenty-four".