2730440 has 16 divisors (see below), whose sum is σ = 6143580. Its totient is φ = 1092160.

The previous prime is 2730439. The next prime is 2730443. The reversal of 2730440 is 440372.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2292196 + 438244 = 1514^2 + 662^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2730443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34091 + ... + 34170.

2^2730440 is an apocalyptic number.

2730440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2730440 is an abundant number, since it is smaller than the sum of its proper divisors (3413140).

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

2730440 is a wasteful number, since it uses less digits than its factorization.

2730440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68272 (or 68268 counting only the distinct ones).

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

The square root of 2730440 is about 1652.4043088784. The cubic root of 2730440 is about 139.7690068373.

The spelling of 2730440 in words is "two million, seven hundred thirty thousand, four hundred forty".