28445197 has 8 divisors (see below), whose sum is σ = 32032512. Its totient is φ = 25024800.

The previous prime is 28445191. The next prime is 28445213. The reversal of 28445197 is 79154482.

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 28445197 - 2¹⁹ = 27920909 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 (28445191) 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, 41368 + ... + 42049.

It is an arithmetic number, because the mean of its divisors is an integer number (4004064).

Almost surely, 2^28445197 is an apocalyptic number.

It is an amenable number.

28445197 is a deficient number, since it is larger than the sum of its proper divisors (3587315).

28445197 is a wasteful number, since it uses less digits than its factorization.

28445197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83459.

The product of its digits is 80640, while the sum is 40.

The square root of 28445197 is about 5333.4038849500. The cubic root of 28445197 is about 305.2598233896.

The spelling of 28445197 in words is "twenty-eight million, four hundred forty-five thousand, one hundred ninety-seven".