28337393 has 4 divisors (see below), whose sum is σ = 32385600. Its totient is φ = 24289188.

The previous prime is 28337363. The next prime is 28337399. The reversal of 28337393 is 39373382.

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.

It is not a de Polignac number, because 28337393 - 2⁸ = 28337137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28337399) 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, 2024093 + ... + 2024106.

It is an arithmetic number, because the mean of its divisors is an integer number (8096400).

Almost surely, 2^28337393 is an apocalyptic number.

It is an amenable number.

28337393 is a deficient number, since it is larger than the sum of its proper divisors (4048207).

28337393 is an equidigital number, since it uses as much as digits as its factorization.

28337393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048206.

The product of its digits is 81648, while the sum is 38.

The square root of 28337393 is about 5323.2877998470. The cubic root of 28337393 is about 304.8737020754.

The spelling of 28337393 in words is "twenty-eight million, three hundred thirty-seven thousand, three hundred ninety-three".