28610555 has 4 divisors (see below), whose sum is σ = 34332672. Its totient is φ = 22888440.

The previous prime is 28610539. The next prime is 28610557. The reversal of 28610555 is 55501682.

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

It is not a de Polignac number, because 28610555 - 2⁴ = 28610539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28610557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2861051 + ... + 2861060.

It is an arithmetic number, because the mean of its divisors is an integer number (8583168).

Almost surely, 2^28610555 is an apocalyptic number.

28610555 is a deficient number, since it is larger than the sum of its proper divisors (5722117).

28610555 is an equidigital number, since it uses as much as digits as its factorization.

28610555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722116.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 28610555 is about 5348.8835283637. The cubic root of 28610555 is about 305.8501943763.

The spelling of 28610555 in words is "twenty-eight million, six hundred ten thousand, five hundred fifty-five".