28774618 has 8 divisors (see below), whose sum is σ = 43249248. Its totient is φ = 14358204.

The previous prime is 28774609. The next prime is 28774619. The reversal of 28774618 is 81647782.

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

It is not an unprimeable number, because it can be changed into a prime (28774619) 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 3 ways as a sum of consecutive naturals, for example, 13296 + ... + 15307.

It is an arithmetic number, because the mean of its divisors is an integer number (5406156).

Almost surely, 2^28774618 is an apocalyptic number.

28774618 is a deficient number, since it is larger than the sum of its proper divisors (14474630).

28774618 is a wasteful number, since it uses less digits than its factorization.

28774618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29108.

The product of its digits is 150528, while the sum is 43.

The square root of 28774618 is about 5364.1977965023. The cubic root of 28774618 is about 306.4336980369.

It can be divided in two parts, 28774 and 618, that added together give a palindrome (29392).

The spelling of 28774618 in words is "twenty-eight million, seven hundred seventy-four thousand, six hundred eighteen".