28745618 has 32 divisors (see below), whose sum is σ = 49116672. Its totient is φ = 12499200.

The previous prime is 28745611. The next prime is 28745621. The reversal of 28745618 is 81654782.

It is not an unprimeable number, because it can be changed into a prime (28745611) 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, 76880 + ... + 77252.

It is an arithmetic number, because the mean of its divisors is an integer number (1534896).

Almost surely, 2^28745618 is an apocalyptic number.

28745618 is a deficient number, since it is larger than the sum of its proper divisors (20371054).

28745618 is a wasteful number, since it uses less digits than its factorization.

28745618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530.

The product of its digits is 107520, while the sum is 41.

The square root of 28745618 is about 5361.4940082033. The cubic root of 28745618 is about 306.3307188035.

The spelling of 28745618 in words is "twenty-eight million, seven hundred forty-five thousand, six hundred eighteen".