2240805 has 16 divisors (see below), whose sum is σ = 4097664. Its totient is φ = 1024320.

The previous prime is 2240789. The next prime is 2240807. The reversal of 2240805 is 5080422.

It is not a de Polignac number, because 2240805 - 2⁴ = 2240789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

2240805 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2240807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10566 + ... + 10775.

It is an arithmetic number, because the mean of its divisors is an integer number (256104).

2^2240805 is an apocalyptic number.

It is an amenable number.

2240805 is a deficient number, since it is larger than the sum of its proper divisors (1856859).

2240805 is a wasteful number, since it uses less digits than its factorization.

2240805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21356.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2240805 is about 1496.9318621768. The cubic root of 2240805 is about 130.8583243897.

The spelling of 2240805 in words is "two million, two hundred forty thousand, eight hundred five".