28330556 has 12 divisors (see below), whose sum is σ = 50176392. Its totient is φ = 13994448.

The previous prime is 28330537. The next prime is 28330573. The reversal of 28330556 is 65503382.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42335 + ... + 42998.

It is an arithmetic number, because the mean of its divisors is an integer number (4181366).

Almost surely, 2^28330556 is an apocalyptic number.

It is an amenable number.

28330556 is a deficient number, since it is larger than the sum of its proper divisors (21845836).

28330556 is a wasteful number, since it uses less digits than its factorization.

28330556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85420 (or 85418 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 28330556 is about 5322.6455827906. The cubic root of 28330556 is about 304.8491810105.

The spelling of 28330556 in words is "twenty-eight million, three hundred thirty thousand, five hundred fifty-six".