28444618 has 8 divisors (see below), whose sum is σ = 42718212. Its totient is φ = 14205216.

The previous prime is 28444597. The next prime is 28444657. The reversal of 28444618 is 81644482.

It can be written as a sum of positive squares in 2 ways, for example, as 25070049 + 3374569 = 5007^2 + 1837^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6355 + ... + 9862.

Almost surely, 2^28444618 is an apocalyptic number.

28444618 is a deficient number, since it is larger than the sum of its proper divisors (14273594).

28444618 is a wasteful number, since it uses less digits than its factorization.

28444618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17096.

The product of its digits is 49152, while the sum is 37.

The square root of 28444618 is about 5333.3496041418. The cubic root of 28444618 is about 305.2577521948.

The spelling of 28444618 in words is "twenty-eight million, four hundred forty-four thousand, six hundred eighteen".