28360393 has 4 divisors (see below), whose sum is σ = 28371328. Its totient is φ = 28349460.

The previous prime is 28360391. The next prime is 28360399. The reversal of 28360393 is 39306382.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28360393 - 2¹ = 28360391 is a prime.

It is a super-2 number, since 2×28360393² = 1608623782228898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28360391) 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, 880 + ... + 7582.

It is an arithmetic number, because the mean of its divisors is an integer number (7092832).

Almost surely, 2^28360393 is an apocalyptic number.

It is an amenable number.

28360393 is a deficient number, since it is larger than the sum of its proper divisors (10935).

28360393 is an equidigital number, since it uses as much as digits as its factorization.

28360393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10934.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 28360393 is about 5325.4476807119. The cubic root of 28360393 is about 304.9561631882.

The spelling of 28360393 in words is "twenty-eight million, three hundred sixty thousand, three hundred ninety-three".