28370723 has 4 divisors (see below), whose sum is σ = 28382760. Its totient is φ = 28358688.

The previous prime is 28370711. The next prime is 28370737. The reversal of 28370723 is 32707382.

It is a happy number.

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 28370723 - 2⁶ = 28370659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28370723.

It is not an unprimeable number, because it can be changed into a prime (28372723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193 + ... + 7626.

It is an arithmetic number, because the mean of its divisors is an integer number (7095690).

Almost surely, 2^28370723 is an apocalyptic number.

28370723 is a deficient number, since it is larger than the sum of its proper divisors (12037).

28370723 is an equidigital number, since it uses as much as digits as its factorization.

28370723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12036.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 28370723 is about 5326.4174639245. The cubic root of 28370723 is about 304.9931844755.

The spelling of 28370723 in words is "twenty-eight million, three hundred seventy thousand, seven hundred twenty-three".