28075550 has 24 divisors (see below), whose sum is σ = 52373136. Its totient is φ = 11197440.

The previous prime is 28075549. The next prime is 28075561. The reversal of 28075550 is 5557082.

It is a happy number.

It is a Curzon 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 11 ways as a sum of consecutive naturals, for example, 23774 + ... + 24926.

It is an arithmetic number, because the mean of its divisors is an integer number (2182214).

Almost surely, 2^28075550 is an apocalyptic number.

28075550 is a deficient number, since it is larger than the sum of its proper divisors (24297586).

28075550 is a wasteful number, since it uses less digits than its factorization.

28075550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 28075550 is about 5298.6366170931. The cubic root of 28075550 is about 303.9317641748.

The spelling of 28075550 in words is "twenty-eight million, seventy-five thousand, five hundred fifty".