28195317 has 8 divisors (see below), whose sum is σ = 41770880. Its totient is φ = 18796860.

The previous prime is 28195303. The next prime is 28195319. The reversal of 28195317 is 71359182.

It is not a de Polignac number, because 28195317 - 2¹⁹ = 27671029 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 (28195319) 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, 522109 + ... + 522162.

It is an arithmetic number, because the mean of its divisors is an integer number (5221360).

Almost surely, 2^28195317 is an apocalyptic number.

28195317 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28195317 is a deficient number, since it is larger than the sum of its proper divisors (13575563).

28195317 is a wasteful number, since it uses less digits than its factorization.

28195317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044280 (or 1044274 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 28195317 is about 5309.9262706746. The cubic root of 28195317 is about 304.3633301593.

The spelling of 28195317 in words is "twenty-eight million, one hundred ninety-five thousand, three hundred seventeen".