28278565424 has 20 divisors (see below), whose sum is σ = 56270524944. Its totient is φ = 13757139648.

The previous prime is 28278565373. The next prime is 28278565433. The reversal of 28278565424 is 42456587282.

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, 23883332 + ... + 23884515.

Almost surely, 2^28278565424 is an apocalyptic number.

It is an amenable number.

28278565424 is a deficient number, since it is larger than the sum of its proper divisors (27991959520).

28278565424 is a wasteful number, since it uses less digits than its factorization.

28278565424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47767892 (or 47767886 counting only the distinct ones).

The product of its digits is 8601600, while the sum is 53.

The spelling of 28278565424 in words is "twenty-eight billion, two hundred seventy-eight million, five hundred sixty-five thousand, four hundred twenty-four".