28080021874 has 4 divisors (see below), whose sum is σ = 42120032814. Its totient is φ = 14040010936.

The previous prime is 28080021869. The next prime is 28080021883. The reversal of 28080021874 is 47812008082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27170577225 + 909444649 = 164835^2 + 30157^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7020005467 + ... + 7020005470.

Almost surely, 2^28080021874 is an apocalyptic number.

28080021874 is a deficient number, since it is larger than the sum of its proper divisors (14040010940).

28080021874 is a wasteful number, since it uses less digits than its factorization.

28080021874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14040010939.

The product of its (nonzero) digits is 57344, while the sum is 40.

The spelling of 28080021874 in words is "twenty-eight billion, eighty million, twenty-one thousand, eight hundred seventy-four".