28360493 has 4 divisors (see below), whose sum is σ = 32412000. Its totient is φ = 24308988.

The previous prime is 28360481. The next prime is 28360513. The reversal of 28360493 is 39406382.

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: 39406382 = 2 ⋅19703191.

It is a cyclic number.

It is not a de Polignac number, because 28360493 - 2¹⁶ = 28294957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28360433) 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, 2025743 + ... + 2025756.

It is an arithmetic number, because the mean of its divisors is an integer number (8103000).

Almost surely, 2^28360493 is an apocalyptic number.

It is an amenable number.

28360493 is a deficient number, since it is larger than the sum of its proper divisors (4051507).

28360493 is an equidigital number, since it uses as much as digits as its factorization.

28360493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051506.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 28360493 is about 5325.4570695857. The cubic root of 28360493 is about 304.9565216175.

The spelling of 28360493 in words is "twenty-eight million, three hundred sixty thousand, four hundred ninety-three".