2661340 has 24 divisors (see below), whose sum is σ = 6097392. Its totient is φ = 967680.

The previous prime is 2661331. The next prime is 2661341. The reversal of 2661340 is 431662.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5829 + ... + 6268.

It is an arithmetic number, because the mean of its divisors is an integer number (254058).

2^2661340 is an apocalyptic number.

2661340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2661340 is an abundant number, since it is smaller than the sum of its proper divisors (3436052).

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

2661340 is a wasteful number, since it uses less digits than its factorization.

2661340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12117 (or 12115 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2661340 is about 1631.3613946640. The cubic root of 2661340 is about 138.5798607140.

The spelling of 2661340 in words is "two million, six hundred sixty-one thousand, three hundred forty".