2640733 has 4 divisors (see below), whose sum is σ = 2674240. Its totient is φ = 2607228.

The previous prime is 2640721. The next prime is 2640739. The reversal of 2640733 is 3370462.

2640733 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, and also an emirpimes, since its reverse is a distinct semiprime: 3370462 = 2 ⋅1685231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640733 is a prime.

It is a Duffinian number.

2640733 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2640698 and 2640707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640739) 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, 16635 + ... + 16792.

It is an arithmetic number, because the mean of its divisors is an integer number (668560).

2^2640733 is an apocalyptic number.

It is an amenable number.

2640733 is a deficient number, since it is larger than the sum of its proper divisors (33507).

2640733 is an equidigital number, since it uses as much as digits as its factorization.

2640733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33506.

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 2640733 is about 1625.0332304295. The cubic root of 2640733 is about 138.2212546798.

The spelling of 2640733 in words is "two million, six hundred forty thousand, seven hundred thirty-three".