28190373 has 4 divisors (see below), whose sum is σ = 37587168. Its totient is φ = 18793580.

The previous prime is 28190363. The next prime is 28190381. The reversal of 28190373 is 37309182.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28190373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28190363) 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, 4698393 + ... + 4698398.

It is an arithmetic number, because the mean of its divisors is an integer number (9396792).

Almost surely, 2^28190373 is an apocalyptic number.

It is an amenable number.

28190373 is a deficient number, since it is larger than the sum of its proper divisors (9396795).

28190373 is an equidigital number, since it uses as much as digits as its factorization.

28190373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9396794.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 28190373 is about 5309.4607070775. The cubic root of 28190373 is about 304.3455392585.

The spelling of 28190373 in words is "twenty-eight million, one hundred ninety thousand, three hundred seventy-three".