28653218 has 32 divisors (see below), whose sum is σ = 49109760. Its totient is φ = 12418560.

The previous prime is 28653217. The next prime is 28653223. The reversal of 28653218 is 81235682.

It is not an unprimeable number, because it can be changed into a prime (28653217) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 61655 + ... + 62117.

It is an arithmetic number, because the mean of its divisors is an integer number (1534680).

Almost surely, 2^28653218 is an apocalyptic number.

28653218 is a deficient number, since it is larger than the sum of its proper divisors (20456542).

28653218 is a wasteful number, since it uses less digits than its factorization.

28653218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602.

The product of its digits is 23040, while the sum is 35.

The square root of 28653218 is about 5352.8700712795. The cubic root of 28653218 is about 306.0021430354.

The spelling of 28653218 in words is "twenty-eight million, six hundred fifty-three thousand, two hundred eighteen".