28927193 has 4 divisors (see below), whose sum is σ = 29293440. Its totient is φ = 28560948.

The previous prime is 28927189. The next prime is 28927211. The reversal of 28927193 is 39172982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39172982 = 2 ⋅19586491.

It is a cyclic number.

It is not a de Polignac number, because 28927193 - 2² = 28927189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28927193.

It is not an unprimeable number, because it can be changed into a prime (28927153) 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, 183005 + ... + 183162.

It is an arithmetic number, because the mean of its divisors is an integer number (7323360).

Almost surely, 2^28927193 is an apocalyptic number.

It is an amenable number.

28927193 is a deficient number, since it is larger than the sum of its proper divisors (366247).

28927193 is an equidigital number, since it uses as much as digits as its factorization.

28927193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366246.

The product of its digits is 54432, while the sum is 41.

The square root of 28927193 is about 5378.4005986910. The cubic root of 28927193 is about 306.9743565604.

The spelling of 28927193 in words is "twenty-eight million, nine hundred twenty-seven thousand, one hundred ninety-three".