28613245 has 4 divisors (see below), whose sum is σ = 34335900. Its totient is φ = 22890592.

The previous prime is 28613243. The next prime is 28613251. The reversal of 28613245 is 54231682.

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 10106041 + 18507204 = 3179^2 + 4302^2 .

It is a cyclic number.

It is not a de Polignac number, because 28613245 - 2¹ = 28613243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28613243) 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, 2861320 + ... + 2861329.

It is an arithmetic number, because the mean of its divisors is an integer number (8583975).

Almost surely, 2^28613245 is an apocalyptic number.

It is an amenable number.

28613245 is a deficient number, since it is larger than the sum of its proper divisors (5722655).

28613245 is an equidigital number, since it uses as much as digits as its factorization.

28613245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722654.

The product of its digits is 11520, while the sum is 31.

The square root of 28613245 is about 5349.1349767977. The cubic root of 28613245 is about 305.8597795479.

It can be divided in two parts, 286 and 13245, that added together give a palindrome (13531).

The spelling of 28613245 in words is "twenty-eight million, six hundred thirteen thousand, two hundred forty-five".