2660340 has 48 divisors (see below), whose sum is σ = 7539840. Its totient is φ = 700800.

The previous prime is 2660311. The next prime is 2660351. The reversal of 2660340 is 430662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5841 + ... + 6279.

It is an arithmetic number, because the mean of its divisors is an integer number (157080).

2^2660340 is an apocalyptic number.

2660340 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 2660340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3769920).

2660340 is an abundant number, since it is smaller than the sum of its proper divisors (4879500).

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

2660340 is a wasteful number, since it uses less digits than its factorization.

2660340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2660340 is about 1631.0548733872. The cubic root of 2660340 is about 138.5625013860.

The spelling of 2660340 in words is "two million, six hundred sixty thousand, three hundred forty".