2439540 has 36 divisors (see below), whose sum is σ = 7400484. Its totient is φ = 650496.

The previous prime is 2439527. The next prime is 2439553. The reversal of 2439540 is 459342.

2439540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2439527) and next prime (2439553).

It can be written as a sum of positive squares in 2 ways, for example, as 1411344 + 1028196 = 1188^2 + 1014^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 6597 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (205569).

2^2439540 is an apocalyptic number.

2439540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2439540 is an abundant number, since it is smaller than the sum of its proper divisors (4960944).

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

2439540 is a wasteful number, since it uses less digits than its factorization.

2439540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13568 (or 13563 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2439540 is about 1561.9026858290. The cubic root of 2439540 is about 134.6178492903.

The spelling of 2439540 in words is "two million, four hundred thirty-nine thousand, five hundred forty".