2440645 has 16 divisors (see below), whose sum is σ = 3219840. Its totient is φ = 1767744.

The previous prime is 2440643. The next prime is 2440649. The reversal of 2440645 is 5460442.

It is a cyclic number.

It is not a de Polignac number, because 2440645 - 2¹ = 2440643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2440643) 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, 1627 + ... + 2743.

It is an arithmetic number, because the mean of its divisors is an integer number (201240).

2^2440645 is an apocalyptic number.

It is an amenable number.

2440645 is a deficient number, since it is larger than the sum of its proper divisors (779195).

2440645 is a wasteful number, since it uses less digits than its factorization.

2440645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 2440645 is about 1562.2563810079. The cubic root of 2440645 is about 134.6381714644.

The spelling of 2440645 in words is "two million, four hundred forty thousand, six hundred forty-five".