28561379428 has 24 divisors (see below), whose sum is σ = 51056111232. Its totient is φ = 13974041184.

The previous prime is 28561379411. The next prime is 28561379447. The reversal of 28561379428 is 82497316582.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1167975 + ... + 1192177.

It is an arithmetic number, because the mean of its divisors is an integer number (2127337968).

Almost surely, 2^28561379428 is an apocalyptic number.

It is an amenable number.

28561379428 is a deficient number, since it is larger than the sum of its proper divisors (22494731804).

28561379428 is a wasteful number, since it uses less digits than its factorization.

28561379428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30531 (or 30529 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The spelling of 28561379428 in words is "twenty-eight billion, five hundred sixty-one million, three hundred seventy-nine thousand, four hundred twenty-eight".