28906550 has 12 divisors (see below), whose sum is σ = 53766276. Its totient is φ = 11562600.

The previous prime is 28906529. The next prime is 28906567. The reversal of 28906550 is 5560982.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28906550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289016 + ... + 289115.

It is an arithmetic number, because the mean of its divisors is an integer number (4480523).

Almost surely, 2^28906550 is an apocalyptic number.

28906550 is a deficient number, since it is larger than the sum of its proper divisors (24859726).

28906550 is a wasteful number, since it uses less digits than its factorization.

28906550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578143 (or 578138 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 28906550 is about 5376.4811912626. The cubic root of 28906550 is about 306.9013182534.

The spelling of 28906550 in words is "twenty-eight million, nine hundred six thousand, five hundred fifty".