2609540 has 12 divisors (see below), whose sum is σ = 5480076. Its totient is φ = 1043808.

The previous prime is 2609539. The next prime is 2609587. The reversal of 2609540 is 459062.

It can be written as a sum of positive squares in 2 ways, for example, as 541696 + 2067844 = 736^2 + 1438^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65219 + ... + 65258.

It is an arithmetic number, because the mean of its divisors is an integer number (456673).

2^2609540 is an apocalyptic number.

2609540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2609540 is an abundant number, since it is smaller than the sum of its proper divisors (2870536).

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

2609540 is a wasteful number, since it uses less digits than its factorization.

2609540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130486 (or 130484 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2609540 is about 1615.4070694410. The cubic root of 2609540 is about 137.6748629267.

The spelling of 2609540 in words is "two million, six hundred nine thousand, five hundred forty".