2540778 has 8 divisors (see below), whose sum is σ = 5081568. Its totient is φ = 846924.

The previous prime is 2540771. The next prime is 2540789. The reversal of 2540778 is 8770452.

2540778 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.

2540778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2540771) 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, 211726 + ... + 211737.

It is an arithmetic number, because the mean of its divisors is an integer number (635196).

2^2540778 is an apocalyptic number.

2540778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2540778 is a wasteful number, since it uses less digits than its factorization.

2540778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423468.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 2540778 is about 1593.9818066716. The cubic root of 2540778 is about 136.4548281342.

The spelling of 2540778 in words is "two million, five hundred forty thousand, seven hundred seventy-eight".