28775197 has 8 divisors (see below), whose sum is σ = 31789440. Its totient is φ = 25827360.

The previous prime is 28775179. The next prime is 28775207. The reversal of 28775197 is 79157782.

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 28775197 - 2¹⁵ = 28742429 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 (28775107) 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, 15688 + ... + 17425.

It is an arithmetic number, because the mean of its divisors is an integer number (3973680).

Almost surely, 2^28775197 is an apocalyptic number.

It is an amenable number.

28775197 is a deficient number, since it is larger than the sum of its proper divisors (3014243).

28775197 is a wasteful number, since it uses less digits than its factorization.

28775197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33203.

The product of its digits is 246960, while the sum is 46.

The square root of 28775197 is about 5364.2517651579. The cubic root of 28775197 is about 306.4357533659.

The spelling of 28775197 in words is "twenty-eight million, seven hundred seventy-five thousand, one hundred ninety-seven".