28559605 has 4 divisors (see below), whose sum is σ = 34271532. Its totient is φ = 22847680.

The previous prime is 28559593. The next prime is 28559617. The reversal of 28559605 is 50695582.

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 (28559593) and next prime (28559617).

It can be written as a sum of positive squares in 2 ways, for example, as 17363889 + 11195716 = 4167^2 + 3346^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28559605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2855956 + ... + 2855965.

It is an arithmetic number, because the mean of its divisors is an integer number (8567883).

Almost surely, 2^28559605 is an apocalyptic number.

It is an amenable number.

28559605 is a deficient number, since it is larger than the sum of its proper divisors (5711927).

28559605 is an equidigital number, since it uses as much as digits as its factorization.

28559605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5711926.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 28559605 is about 5344.1187299685. The cubic root of 28559605 is about 305.6685326698.

The spelling of 28559605 in words is "twenty-eight million, five hundred fifty-nine thousand, six hundred five".