28234493 has 4 divisors (see below), whose sum is σ = 32268000. Its totient is φ = 24200988.

The previous prime is 28234489. The next prime is 28234511. The reversal of 28234493 is 39443282.

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.

It is not a de Polignac number, because 28234493 - 2² = 28234489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28234793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2016743 + ... + 2016756.

It is an arithmetic number, because the mean of its divisors is an integer number (8067000).

Almost surely, 2^28234493 is an apocalyptic number.

It is an amenable number.

28234493 is a deficient number, since it is larger than the sum of its proper divisors (4033507).

28234493 is an equidigital number, since it uses as much as digits as its factorization.

28234493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033506.

The product of its digits is 41472, while the sum is 35.

The square root of 28234493 is about 5313.6139302738. The cubic root of 28234493 is about 304.5042308580.

The spelling of 28234493 in words is "twenty-eight million, two hundred thirty-four thousand, four hundred ninety-three".