28083540025 has 6 divisors (see below), whose sum is σ = 34823589662. Its totient is φ = 22466832000.

The previous prime is 28083539987. The next prime is 28083540047. The reversal of 28083540025 is 52004538082.

It can be written as a sum of positive squares in 3 ways, for example, as 3164841 + 28080375184 = 1779^2 + 167572^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28083540025 is a prime.

It is a Duffinian 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, 561670776 + ... + 561670825.

Almost surely, 2^28083540025 is an apocalyptic number.

28083540025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28083540025 is a deficient number, since it is larger than the sum of its proper divisors (6740049637).

28083540025 is a wasteful number, since it uses less digits than its factorization.

28083540025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123341611 (or 1123341606 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 37.

The spelling of 28083540025 in words is "twenty-eight billion, eighty-three million, five hundred forty thousand, twenty-five".