28446618 has 16 divisors (see below), whose sum is σ = 57826656. Its totient is φ = 9326640.

The previous prime is 28446617. The next prime is 28446619. The reversal of 28446618 is 81664482.

It is an interprime number because it is at equal distance from previous prime (28446617) and next prime (28446619).

It is not an unprimeable number, because it can be changed into a prime (28446611) 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 7 ways as a sum of consecutive naturals, for example, 38496 + ... + 39227.

It is an arithmetic number, because the mean of its divisors is an integer number (3614166).

Almost surely, 2^28446618 is an apocalyptic number.

28446618 is an abundant number, since it is smaller than the sum of its proper divisors (29380038).

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

28446618 is a wasteful number, since it uses less digits than its factorization.

28446618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77789.

The product of its digits is 73728, while the sum is 39.

The square root of 28446618 is about 5333.5371002741. The cubic root of 28446618 is about 305.2649064620.

The spelling of 28446618 in words is "twenty-eight million, four hundred forty-six thousand, six hundred eighteen".