28820618 has 8 divisors (see below), whose sum is σ = 43571712. Its totient is φ = 14296716.

The previous prime is 28820569. The next prime is 28820629. The reversal of 28820618 is 81602882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 56480 + ... + 56987.

It is an arithmetic number, because the mean of its divisors is an integer number (5446464).

Almost surely, 2^28820618 is an apocalyptic number.

28820618 is a deficient number, since it is larger than the sum of its proper divisors (14751094).

28820618 is a wasteful number, since it uses less digits than its factorization.

28820618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113596.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 28820618 is about 5368.4837710475. The cubic root of 28820618 is about 306.5969025825.

The spelling of 28820618 in words is "twenty-eight million, eight hundred twenty thousand, six hundred eighteen".