28397177 has 8 divisors (see below), whose sum is σ = 29478600. Its totient is φ = 27322624.

The previous prime is 28397143. The next prime is 28397183. The reversal of 28397177 is 77179382.

It can be written as a sum of positive squares in 4 ways, for example, as 3904576 + 24492601 = 1976^2 + 4949^2 .

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 28397177 - 2¹² = 28393081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28397107) 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, 7649 + ... + 10737.

It is an arithmetic number, because the mean of its divisors is an integer number (3684825).

Almost surely, 2^28397177 is an apocalyptic number.

It is an amenable number.

28397177 is a deficient number, since it is larger than the sum of its proper divisors (1081423).

28397177 is a wasteful number, since it uses less digits than its factorization.

28397177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435.

The product of its digits is 148176, while the sum is 44.

The square root of 28397177 is about 5328.9001679521. The cubic root of 28397177 is about 305.0879509861.

The spelling of 28397177 in words is "twenty-eight million, three hundred ninety-seven thousand, one hundred seventy-seven".