2640801 has 12 divisors (see below), whose sum is σ = 3624432. Its totient is φ = 1710288.

The previous prime is 2640779. The next prime is 2640821. The reversal of 2640801 is 1080462.

It is not a de Polignac number, because 2640801 - 2⁹ = 2640289 is a prime.

2640801 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2640821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3786 + ... + 4428.

It is an arithmetic number, because the mean of its divisors is an integer number (302036).

2^2640801 is an apocalyptic number.

It is an amenable number.

2640801 is a deficient number, since it is larger than the sum of its proper divisors (983631).

2640801 is an equidigital number, since it uses as much as digits as its factorization.

2640801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 2640801 is about 1625.0541529438. The cubic root of 2640801 is about 138.2224410883. Note that the first 3 decimals are identical.

The spelling of 2640801 in words is "two million, six hundred forty thousand, eight hundred one".