28179245 has 4 divisors (see below), whose sum is σ = 33815100. Its totient is φ = 22543392.

The previous prime is 28179227. The next prime is 28179289. The reversal of 28179245 is 54297182.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16434916 + 11744329 = 4054^2 + 3427^2 .

It is a cyclic number.

It is not a de Polignac number, because 28179245 - 2⁶ = 28179181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28179199 and 28179208.

It is a congruent number.

It is an unprimeable number.

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, 2817920 + ... + 2817929.

It is an arithmetic number, because the mean of its divisors is an integer number (8453775).

Almost surely, 2^28179245 is an apocalyptic number.

It is an amenable number.

28179245 is a deficient number, since it is larger than the sum of its proper divisors (5635855).

28179245 is an equidigital number, since it uses as much as digits as its factorization.

28179245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635854.

The product of its digits is 40320, while the sum is 38.

The square root of 28179245 is about 5308.4126629342. The cubic root of 28179245 is about 304.3054877263.

The spelling of 28179245 in words is "twenty-eight million, one hundred seventy-nine thousand, two hundred forty-five".