2239618 has 4 divisors (see below), whose sum is σ = 3359430. Its totient is φ = 1119808.

The previous prime is 2239607. The next prime is 2239639. The reversal of 2239618 is 8169322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1996569 + 243049 = 1413^2 + 493^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2239618.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559903 + ... + 559906.

2^2239618 is an apocalyptic number.

2239618 is a deficient number, since it is larger than the sum of its proper divisors (1119812).

2239618 is a wasteful number, since it uses less digits than its factorization.

2239618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119811.

The product of its digits is 5184, while the sum is 31.

The square root of 2239618 is about 1496.5353320253. The cubic root of 2239618 is about 130.8352142030.

The spelling of 2239618 in words is "two million, two hundred thirty-nine thousand, six hundred eighteen".