2640726 has 24 divisors (see below), whose sum is σ = 6242184. Its totient is φ = 800160.

The previous prime is 2640721. The next prime is 2640739. The reversal of 2640726 is 6270462.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

2640726 is a modest number, since divided by 726 gives 264 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 2640726.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640721) 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, 6471 + ... + 6866.

It is an arithmetic number, because the mean of its divisors is an integer number (260091).

2^2640726 is an apocalyptic number.

2640726 is an abundant number, since it is smaller than the sum of its proper divisors (3601458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2640726 is a wasteful number, since it uses less digits than its factorization.

2640726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13356 (or 13353 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 2640726 is about 1625.0310766259. The cubic root of 2640726 is about 138.2211325483.

The spelling of 2640726 in words is "two million, six hundred forty thousand, seven hundred twenty-six".