28247123 has 4 divisors (see below), whose sum is σ = 28257840. Its totient is φ = 28236408.

The previous prime is 28247119. The next prime is 28247201. The reversal of 28247123 is 32174282.

It is a semiprime because it is the product of two primes, 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 28247123 - 2² = 28247119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28241123) 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, 1661 + ... + 7697.

It is an arithmetic number, because the mean of its divisors is an integer number (7064460).

Almost surely, 2^28247123 is an apocalyptic number.

28247123 is a deficient number, since it is larger than the sum of its proper divisors (10717).

28247123 is an equidigital number, since it uses as much as digits as its factorization.

28247123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10716.

The product of its digits is 5376, while the sum is 29.

The square root of 28247123 is about 5314.8022540825. The cubic root of 28247123 is about 304.5496282274.

The spelling of 28247123 in words is "twenty-eight million, two hundred forty-seven thousand, one hundred twenty-three".