2640463 has 6 divisors (see below), whose sum is σ = 3071616. Its totient is φ = 2263212.

The previous prime is 2640409. The next prime is 2640497. The reversal of 2640463 is 3640462.

It is not a de Polignac number, because 2640463 - 2¹³ = 2632271 is a prime.

It is a Duffinian number.

2640463 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26895 + ... + 26992.

It is an arithmetic number, because the mean of its divisors is an integer number (511936).

2^2640463 is an apocalyptic number.

2640463 is a deficient number, since it is larger than the sum of its proper divisors (431153).

2640463 is an equidigital number, since it uses as much as digits as its factorization.

2640463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53901 (or 53894 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 2640463 is about 1624.9501530816. The cubic root of 2640463 is about 138.2165437389.

Subtracting 2640463 from its reverse (3640462), we obtain a palindrome (999999).

The spelling of 2640463 in words is "two million, six hundred forty thousand, four hundred sixty-three".