28124323 has 4 divisors (see below), whose sum is σ = 28279888. Its totient is φ = 27968760.

The previous prime is 28124309. The next prime is 28124333. The reversal of 28124323 is 32342182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28124323 - 2¹³ = 28116131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28124333) 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, 77511 + ... + 77872.

It is an arithmetic number, because the mean of its divisors is an integer number (7069972).

Almost surely, 2^28124323 is an apocalyptic number.

28124323 is a deficient number, since it is larger than the sum of its proper divisors (155565).

28124323 is a wasteful number, since it uses less digits than its factorization.

28124323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155564.

The product of its digits is 2304, while the sum is 25.

The square root of 28124323 is about 5303.2370303429. The cubic root of 28124323 is about 304.1076596698.

The spelling of 28124323 in words is "twenty-eight million, one hundred twenty-four thousand, three hundred twenty-three".