2640633 has 4 divisors (see below), whose sum is σ = 3520848. Its totient is φ = 1760420.

The previous prime is 2640581. The next prime is 2640643. The reversal of 2640633 is 3360462.

2640633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2640633 - 2¹⁷ = 2509561 is a prime.

It is a D-number.

2640633 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2640643) 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 3 ways as a sum of consecutive naturals, for example, 440103 + ... + 440108.

It is an arithmetic number, because the mean of its divisors is an integer number (880212).

2^2640633 is an apocalyptic number.

It is an amenable number.

2640633 is a deficient number, since it is larger than the sum of its proper divisors (880215).

2640633 is an equidigital number, since it uses as much as digits as its factorization.

2640633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880214.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 2640633 is about 1625.0024615366. The cubic root of 2640633 is about 138.2195099243.

The spelling of 2640633 in words is "two million, six hundred forty thousand, six hundred thirty-three".