28557742384 has 20 divisors (see below), whose sum is σ = 56374601616. Its totient is φ = 14009458112.

The previous prime is 28557742363. The next prime is 28557742391. The reversal of 28557742384 is 48324775582.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16837444 + ... + 16839139.

Almost surely, 2^28557742384 is an apocalyptic number.

It is an amenable number.

28557742384 is a deficient number, since it is larger than the sum of its proper divisors (27816859232).

28557742384 is a wasteful number, since it uses less digits than its factorization.

28557742384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33676644 (or 33676638 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 55.

The spelling of 28557742384 in words is "twenty-eight billion, five hundred fifty-seven million, seven hundred forty-two thousand, three hundred eighty-four".