28750308 has 24 divisors (see below), whose sum is σ = 67599840. Its totient is φ = 9509760.

The previous prime is 28750301. The next prime is 28750321. The reversal of 28750308 is 80305782.

It is not an unprimeable number, because it can be changed into a prime (28750301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7573 + ... + 10716.

It is an arithmetic number, because the mean of its divisors is an integer number (2816660).

Almost surely, 2^28750308 is an apocalyptic number.

It is an amenable number.

28750308 is an abundant number, since it is smaller than the sum of its proper divisors (38849532).

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

28750308 is a wasteful number, since it uses less digits than its factorization.

28750308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18427 (or 18425 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 28750308 is about 5361.9313684530. The cubic root of 28750308 is about 306.3473777245.

The spelling of 28750308 in words is "twenty-eight million, seven hundred fifty thousand, three hundred eight".