2540278 has 16 divisors (see below), whose sum is σ = 4205376. Its totient is φ = 1143360.

The previous prime is 2540269. The next prime is 2540323. The reversal of 2540278 is 8720452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126 + ... + 2257.

It is an arithmetic number, because the mean of its divisors is an integer number (262836).

2^2540278 is an apocalyptic number.

2540278 is a deficient number, since it is larger than the sum of its proper divisors (1665098).

2540278 is a wasteful number, since it uses less digits than its factorization.

2540278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 2540278 is about 1593.8249590215. The cubic root of 2540278 is about 136.4458765597.

It can be divided in two parts, 2 and 540278, that added together give a triangular number (540280 = T₁₀₃₉).

The spelling of 2540278 in words is "two million, five hundred forty thousand, two hundred seventy-eight".