28479245 has 4 divisors (see below), whose sum is σ = 34175100. Its totient is φ = 22783392.

The previous prime is 28479239. The next prime is 28479251. The reversal of 28479245 is 54297482.

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

It is an interprime number because it is at equal distance from previous prime (28479239) and next prime (28479251).

It can be written as a sum of positive squares in 2 ways, for example, as 13097161 + 15382084 = 3619^2 + 3922^2 .

It is a cyclic number.

It is not a de Polignac number, because 28479245 - 2⁶ = 28479181 is a prime.

It is a super-2 number, since 2×28479245² = 1622134791540050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 2847920 + ... + 2847929.

It is an arithmetic number, because the mean of its divisors is an integer number (8543775).

Almost surely, 2^28479245 is an apocalyptic number.

It is an amenable number.

28479245 is a deficient number, since it is larger than the sum of its proper divisors (5695855).

28479245 is an equidigital number, since it uses as much as digits as its factorization.

28479245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5695854.

The product of its digits is 161280, while the sum is 41.

The square root of 28479245 is about 5336.5948881286. The cubic root of 28479245 is about 305.3815702740.

The spelling of 28479245 in words is "twenty-eight million, four hundred seventy-nine thousand, two hundred forty-five".