2659540 has 48 divisors (see below), whose sum is σ = 6159888. Its totient is φ = 958464.

The previous prime is 2659537. The next prime is 2659549. The reversal of 2659540 is 459562.

It can be written as a sum of positive squares in 8 ways, for example, as 213444 + 2446096 = 462^2 + 1564^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2659549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13684 + ... + 13876.

It is an arithmetic number, because the mean of its divisors is an integer number (128331).

2^2659540 is an apocalyptic number.

2659540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2659540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3079944).

2659540 is an abundant number, since it is smaller than the sum of its proper divisors (3500348).

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

2659540 is a wasteful number, since it uses less digits than its factorization.

2659540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2659540 is about 1630.8096148846. The cubic root of 2659540 is about 138.5486107913.

It can be divided in two parts, 265 and 9540, that multiplied together give a square (2528100 = 1590²).

The spelling of 2659540 in words is "two million, six hundred fifty-nine thousand, five hundred forty".