28797017 has 4 divisors (see below), whose sum is σ = 29066256. Its totient is φ = 28527780.

The previous prime is 28797011. The next prime is 28797023. The reversal of 28797017 is 71079782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71079782 = 2 ⋅35539891.

It is an interprime number because it is at equal distance from previous prime (28797011) and next prime (28797023).

It is a cyclic number.

It is not a de Polignac number, because 28797017 - 2⁶ = 28796953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28797011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134459 + ... + 134672.

It is an arithmetic number, because the mean of its divisors is an integer number (7266564).

Almost surely, 2^28797017 is an apocalyptic number.

It is an amenable number.

28797017 is a deficient number, since it is larger than the sum of its proper divisors (269239).

28797017 is a wasteful number, since it uses less digits than its factorization.

28797017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269238.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 28797017 is about 5366.2852141868. The cubic root of 28797017 is about 306.5131897169.

The spelling of 28797017 in words is "twenty-eight million, seven hundred ninety-seven thousand, seventeen".