2640870 has 32 divisors (see below), whose sum is σ = 7043040. Its totient is φ = 704160.

The previous prime is 2640863. The next prime is 2640871. The reversal of 2640870 is 780462.

2640870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4621 + ... + 5160.

It is an arithmetic number, because the mean of its divisors is an integer number (220095).

2^2640870 is an apocalyptic number.

2640870 is an abundant number, since it is smaller than the sum of its proper divisors (4402170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2640870 is a wasteful number, since it uses less digits than its factorization.

2640870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9797 (or 9791 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 2640870 is about 1625.0753828669. The cubic root of 2640870 is about 138.2236449232.

The spelling of 2640870 in words is "two million, six hundred forty thousand, eight hundred seventy".