28518197 has 8 divisors (see below), whose sum is σ = 30326400. Its totient is φ = 26724544.

The previous prime is 28518173. The next prime is 28518199. The reversal of 28518197 is 79181582.

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

It is not a de Polignac number, because 28518197 - 2¹⁰ = 28517173 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 (28518199) 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, 554 + ... + 7572.

It is an arithmetic number, because the mean of its divisors is an integer number (3790800).

Almost surely, 2^28518197 is an apocalyptic number.

It is an amenable number.

28518197 is a deficient number, since it is larger than the sum of its proper divisors (1808203).

28518197 is a wasteful number, since it uses less digits than its factorization.

28518197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7275.

The product of its digits is 40320, while the sum is 41.

The square root of 28518197 is about 5340.2431592578. The cubic root of 28518197 is about 305.5207336528.

The spelling of 28518197 in words is "twenty-eight million, five hundred eighteen thousand, one hundred ninety-seven".