28005255028 has 6 divisors (see below), whose sum is σ = 49009196306. Its totient is φ = 14002627512.

The previous prime is 28005255017. The next prime is 28005255071. The reversal of 28005255028 is 82055250082.

It can be written as a sum of positive squares in only one way, i.e., 27788223204 + 217031824 = 166698^2 + 14732^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3500656875 + ... + 3500656882.

Almost surely, 2^28005255028 is an apocalyptic number.

It is an amenable number.

28005255028 is a deficient number, since it is larger than the sum of its proper divisors (21003941278).

28005255028 is a wasteful number, since it uses less digits than its factorization.

28005255028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7001313761 (or 7001313759 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 37.

The spelling of 28005255028 in words is "twenty-eight billion, five million, two hundred fifty-five thousand, twenty-eight".