28617245 has 8 divisors (see below), whose sum is σ = 34592184. Its totient is φ = 22726144.

The previous prime is 28617227. The next prime is 28617269. The reversal of 28617245 is 54271682.

It can be written as a sum of positive squares in 4 ways, for example, as 2627641 + 25989604 = 1621^2 + 5098^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28617245 - 2¹² = 28613149 is a prime.

It is a super-2 number, since 2×28617245² = 1637893422780050, which contains 22 as substring.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 20204 + ... + 21573.

It is an arithmetic number, because the mean of its divisors is an integer number (4324023).

Almost surely, 2^28617245 is an apocalyptic number.

It is an amenable number.

28617245 is a deficient number, since it is larger than the sum of its proper divisors (5974939).

28617245 is a wasteful number, since it uses less digits than its factorization.

28617245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41919.

The product of its digits is 26880, while the sum is 35.

The square root of 28617245 is about 5349.5088559605. The cubic root of 28617245 is about 305.8740314805.

The spelling of 28617245 in words is "twenty-eight million, six hundred seventeen thousand, two hundred forty-five".