28025317 has 8 divisors (see below), whose sum is σ = 29051000. Its totient is φ = 27013824.

The previous prime is 28025311. The next prime is 28025351. The reversal of 28025317 is 71352082.

It can be written as a sum of positive squares in 4 ways, for example, as 18096516 + 9928801 = 4254^2 + 3151^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28025317 - 2⁷ = 28025189 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 (28025311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559 + ... + 7507.

It is an arithmetic number, because the mean of its divisors is an integer number (3631375).

Almost surely, 2^28025317 is an apocalyptic number.

It is an amenable number.

28025317 is a deficient number, since it is larger than the sum of its proper divisors (1025683).

28025317 is a wasteful number, since it uses less digits than its factorization.

28025317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7095.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28025317 is about 5293.8943132632. The cubic root of 28025317 is about 303.7503902404.

Adding to 28025317 its reverse (71352082), we get a palindrome (99377399).

The spelling of 28025317 in words is "twenty-eight million, twenty-five thousand, three hundred seventeen".