28752218 has 16 divisors (see below), whose sum is σ = 47696256. Its totient is φ = 12889440.

The previous prime is 28752211. The next prime is 28752239. The reversal of 28752218 is 81225782.

It is not an unprimeable number, because it can be changed into a prime (28752211) 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, 7346 + ... + 10557.

It is an arithmetic number, because the mean of its divisors is an integer number (2981016).

Almost surely, 2^28752218 is an apocalyptic number.

28752218 is a deficient number, since it is larger than the sum of its proper divisors (18944038).

28752218 is a wasteful number, since it uses less digits than its factorization.

28752218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17989.

The product of its digits is 17920, while the sum is 35.

The square root of 28752218 is about 5362.1094729593. The cubic root of 28752218 is about 306.3541615421.

The spelling of 28752218 in words is "twenty-eight million, seven hundred fifty-two thousand, two hundred eighteen".