28927597 has 4 divisors (see below), whose sum is σ = 29026620. Its totient is φ = 28828576.

The previous prime is 28927589. The next prime is 28927609. The reversal of 28927597 is 79572982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79572982 = 2 ⋅39786491.

It can be written as a sum of positive squares in 2 ways, for example, as 19105641 + 9821956 = 4371^2 + 3134^2 .

It is a cyclic number.

It is not a de Polignac number, because 28927597 - 2³ = 28927589 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28927597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28927567) 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, 49072 + ... + 49657.

It is an arithmetic number, because the mean of its divisors is an integer number (7256655).

Almost surely, 2^28927597 is an apocalyptic number.

It is an amenable number.

28927597 is a deficient number, since it is larger than the sum of its proper divisors (99023).

28927597 is an equidigital number, since it uses as much as digits as its factorization.

28927597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99022.

The product of its digits is 635040, while the sum is 49.

The square root of 28927597 is about 5378.4381561937. The cubic root of 28927597 is about 306.9757856317.

The spelling of 28927597 in words is "twenty-eight million, nine hundred twenty-seven thousand, five hundred ninety-seven".