2740340 has 24 divisors (see below), whose sum is σ = 5794152. Its totient is φ = 1088640.

The previous prime is 2740337. The next prime is 2740343. The reversal of 2740340 is 430472.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2740337) and next prime (2740343).

It can be written as a sum of positive squares in 4 ways, for example, as 4624 + 2735716 = 68^2 + 1654^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2740343) 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, 3242 + ... + 3998.

It is an arithmetic number, because the mean of its divisors is an integer number (241423).

2^2740340 is an apocalyptic number.

2740340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2740340 is an abundant number, since it is smaller than the sum of its proper divisors (3053812).

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

2740340 is a wasteful number, since it uses less digits than its factorization.

2740340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 2740340 is about 1655.3972332948. The cubic root of 2740340 is about 139.9377274070.

The spelling of 2740340 in words is "two million, seven hundred forty thousand, three hundred forty".