28513274844 has 48 divisors (see below), whose sum is σ = 70364631680. Its totient is φ = 8961503040.

The previous prime is 28513274819. The next prime is 28513274851. The reversal of 28513274844 is 44847231582.

It is a junction number, because it is equal to n+sod(n) for n = 28513274793 and 28513274802.

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 15 ways as a sum of consecutive naturals, for example, 248239 + ... + 344454.

Almost surely, 2^28513274844 is an apocalyptic number.

It is an amenable number.

28513274844 is an abundant number, since it is smaller than the sum of its proper divisors (41851356836).

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

28513274844 is a wasteful number, since it uses less digits than its factorization.

28513274844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592930 (or 592928 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 48.

It can be divided in two parts, 285132 and 74844, that added together give a triangular number (359976 = T₈₄₈).

The spelling of 28513274844 in words is "twenty-eight billion, five hundred thirteen million, two hundred seventy-four thousand, eight hundred forty-four".