2240645 has 8 divisors (see below), whose sum is σ = 2933280. Its totient is φ = 1629520.

The previous prime is 2240633. The next prime is 2240647. The reversal of 2240645 is 5460422.

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

It is not a de Polignac number, because 2240645 - 2⁴ = 2240629 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2240645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2240647) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 20315 + ... + 20424.

It is an arithmetic number, because the mean of its divisors is an integer number (366660).

2^2240645 is an apocalyptic number.

It is an amenable number.

2240645 is a deficient number, since it is larger than the sum of its proper divisors (692635).

2240645 is a wasteful number, since it uses less digits than its factorization.

2240645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40755.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2240645 is about 1496.8784185765. The cubic root of 2240645 is about 130.8552097605.

The spelling of 2240645 in words is "two million, two hundred forty thousand, six hundred forty-five".