28275306 has 32 divisors (see below), whose sum is σ = 60164160. Its totient is φ = 8833536.

The previous prime is 28275239. The next prime is 28275307. The reversal of 28275306 is 60357282.

It is not an unprimeable number, because it can be changed into a prime (28275307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9780 + ... + 12336.

It is an arithmetic number, because the mean of its divisors is an integer number (1880130).

Almost surely, 2^28275306 is an apocalyptic number.

28275306 is an abundant number, since it is smaller than the sum of its proper divisors (31888854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28275306 is a wasteful number, since it uses less digits than its factorization.

28275306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 28275306 is about 5317.4529617101. The cubic root of 28275306 is about 304.6508806536.

The spelling of 28275306 in words is "twenty-eight million, two hundred seventy-five thousand, three hundred six".