28275550 has 12 divisors (see below), whose sum is σ = 52592616. Its totient is φ = 11310200.

The previous prime is 28275547. The next prime is 28275563. The reversal of 28275550 is 5557282.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 282706 + ... + 282805.

It is an arithmetic number, because the mean of its divisors is an integer number (4382718).

Almost surely, 2^28275550 is an apocalyptic number.

28275550 is a deficient number, since it is larger than the sum of its proper divisors (24317066).

28275550 is a wasteful number, since it uses less digits than its factorization.

28275550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565523 (or 565518 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 28275550 is about 5317.4759049760. The cubic root of 28275550 is about 304.6517569730.

The spelling of 28275550 in words is "twenty-eight million, two hundred seventy-five thousand, five hundred fifty".