2640705 has 8 divisors (see below), whose sum is σ = 4225152. Its totient is φ = 1408368.

The previous prime is 2640689. The next prime is 2640707. The reversal of 2640705 is 5070462.

It is a happy number.

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

It is not a de Polignac number, because 2640705 - 2⁴ = 2640689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2640707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88009 + ... + 88038.

It is an arithmetic number, because the mean of its divisors is an integer number (528144).

2^2640705 is an apocalyptic number.

It is an amenable number.

2640705 is a deficient number, since it is larger than the sum of its proper divisors (1584447).

2640705 is a wasteful number, since it uses less digits than its factorization.

2640705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176055.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 2640705 is about 1625.0246151982. The cubic root of 2640705 is about 138.2207661527.

The spelling of 2640705 in words is "two million, six hundred forty thousand, seven hundred five".