28068725 has 6 divisors (see below), whose sum is σ = 34805250. Its totient is φ = 22454960.

The previous prime is 28068721. The next prime is 28068727. The reversal of 28068725 is 52786082.

It can be written as a sum of positive squares in 3 ways, for example, as 264196 + 27804529 = 514^2 + 5273^2 .

It is not a de Polignac number, because 28068725 - 2² = 28068721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28068721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561350 + ... + 561399.

It is an arithmetic number, because the mean of its divisors is an integer number (5800875).

Almost surely, 2^28068725 is an apocalyptic number.

28068725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28068725 is a deficient number, since it is larger than the sum of its proper divisors (6736525).

28068725 is a wasteful number, since it uses less digits than its factorization.

28068725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122759 (or 1122754 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 28068725 is about 5297.9925443511. The cubic root of 28068725 is about 303.9071341747.

The spelling of 28068725 in words is "twenty-eight million, sixty-eight thousand, seven hundred twenty-five".