28740306 has 16 divisors (see below), whose sum is σ = 65692224. Its totient is φ = 8211504.

The previous prime is 28740289. The next prime is 28740311. The reversal of 28740306 is 60304782.

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 7 ways as a sum of consecutive naturals, for example, 342105 + ... + 342188.

It is an arithmetic number, because the mean of its divisors is an integer number (4105764).

Almost surely, 2^28740306 is an apocalyptic number.

28740306 is an abundant number, since it is smaller than the sum of its proper divisors (36951918).

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

28740306 is a wasteful number, since it uses less digits than its factorization.

28740306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684305.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 28740306 is about 5360.9986010071. The cubic root of 28740306 is about 306.3118483444.

The spelling of 28740306 in words is "twenty-eight million, seven hundred forty thousand, three hundred six".