2640743 has 8 divisors (see below), whose sum is σ = 3046560. Its totient is φ = 2242080.

The previous prime is 2640739. The next prime is 2640749. The reversal of 2640743 is 3470462.

It is a happy number.

2640743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2640743 - 2² = 2640739 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640749) 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 7 ways as a sum of consecutive naturals, for example, 968 + ... + 2493.

It is an arithmetic number, because the mean of its divisors is an integer number (380820).

2^2640743 is an apocalyptic number.

2640743 is a deficient number, since it is larger than the sum of its proper divisors (405817).

2640743 is a wasteful number, since it uses less digits than its factorization.

2640743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 2640743 is about 1625.0363072867. The cubic root of 2640743 is about 138.2214291529.

The spelling of 2640743 in words is "two million, six hundred forty thousand, seven hundred forty-three".