2640378 has 16 divisors (see below), whose sum is σ = 5687136. Its totient is φ = 812400.

The previous prime is 2640371. The next prime is 2640383. The reversal of 2640378 is 8730462.

2640378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2640371) 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, 16848 + ... + 17003.

It is an arithmetic number, because the mean of its divisors is an integer number (355446).

2^2640378 is an apocalyptic number.

2640378 is an abundant number, since it is smaller than the sum of its proper divisors (3046758).

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

2640378 is a wasteful number, since it uses less digits than its factorization.

2640378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33869.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 2640378 is about 1624.9239982227. The cubic root of 2640378 is about 138.2150605985.

It can be divided in two parts, 26 and 40378, that added together give a palindrome (40404).

The spelling of 2640378 in words is "two million, six hundred forty thousand, three hundred seventy-eight".