28065690725 has 12 divisors (see below), whose sum is σ = 35126707104. Its totient is φ = 22242713520.

The previous prime is 28065690701. The next prime is 28065690727. The reversal of 28065690725 is 52709656082.

It is not a de Polignac number, because 28065690725 - 2⁶ = 28065690661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28065690727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5243249 + ... + 5248598.

It is an arithmetic number, because the mean of its divisors is an integer number (2927225592).

Almost surely, 2^28065690725 is an apocalyptic number.

28065690725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28065690725 is a deficient number, since it is larger than the sum of its proper divisors (7061016379).

28065690725 is a wasteful number, since it uses less digits than its factorization.

28065690725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10491964 (or 10491959 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 28065690725 in words is "twenty-eight billion, sixty-five million, six hundred ninety thousand, seven hundred twenty-five".