2640854 has 4 divisors (see below), whose sum is σ = 3961284. Its totient is φ = 1320426.

The previous prime is 2640853. The next prime is 2640857. The reversal of 2640854 is 4580462.

2640854 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 an emirpimes, since its reverse is a distinct semiprime: 4580462 = 2 ⋅2290231.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640853) 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 as a sum of consecutive naturals, namely, 660212 + ... + 660215.

It is an arithmetic number, because the mean of its divisors is an integer number (990321).

2^2640854 is an apocalyptic number.

2640854 is a deficient number, since it is larger than the sum of its proper divisors (1320430).

2640854 is a wasteful number, since it uses less digits than its factorization.

2640854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320429.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2640854 is about 1625.0704600109. The cubic root of 2640854 is about 138.2233657750.

It can be divided in two parts, 26408 and 54, that added together give a palindrome (26462).

The spelling of 2640854 in words is "two million, six hundred forty thousand, eight hundred fifty-four".