28078080325 has 6 divisors (see below), whose sum is σ = 34816819634. Its totient is φ = 22462464240.

The previous prime is 28078080313. The next prime is 28078080403. The reversal of 28078080325 is 52308087082.

It can be written as a sum of positive squares in 3 ways, for example, as 4985630881 + 23092449444 = 70609^2 + 151962^2 .

It is not a de Polignac number, because 28078080325 - 2⁵ = 28078080293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561561582 + ... + 561561631.

Almost surely, 2^28078080325 is an apocalyptic number.

28078080325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28078080325 is a deficient number, since it is larger than the sum of its proper divisors (6738739309).

28078080325 is a wasteful number, since it uses less digits than its factorization.

28078080325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123123223 (or 1123123218 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 28078080325 in words is "twenty-eight billion, seventy-eight million, eighty thousand, three hundred twenty-five".