28324655 has 4 divisors (see below), whose sum is σ = 33989592. Its totient is φ = 22659720.

The previous prime is 28324651. The next prime is 28324711. The reversal of 28324655 is 55642382.

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

It is not a de Polignac number, because 28324655 - 2² = 28324651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28324651) by changing a digit.

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, 2832461 + ... + 2832470.

It is an arithmetic number, because the mean of its divisors is an integer number (8497398).

Almost surely, 2^28324655 is an apocalyptic number.

28324655 is a deficient number, since it is larger than the sum of its proper divisors (5664937).

28324655 is an equidigital number, since it uses as much as digits as its factorization.

28324655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5664936.

The product of its digits is 57600, while the sum is 35.

The square root of 28324655 is about 5322.0912243215. The cubic root of 28324655 is about 304.8280137600.

The spelling of 28324655 in words is "twenty-eight million, three hundred twenty-four thousand, six hundred fifty-five".