2740440 has 64 divisors (see below), whose sum is σ = 8436960. Its totient is φ = 711680.

The previous prime is 2740421. The next prime is 2740453. The reversal of 2740440 is 440472.

It is a super-2 number, since 2×2740440² = 15020022787200, which contains 22 as substring.

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, 4642 + ... + 5198.

2^2740440 is an apocalyptic number.

2740440 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 2740440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4218480).

2740440 is an abundant number, since it is smaller than the sum of its proper divisors (5696520).

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

2740440 is a wasteful number, since it uses less digits than its factorization.

2740440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 2740440 is about 1655.4274372500. The cubic root of 2740440 is about 139.9394295806.

Subtracting from 2740440 its reverse (440472), we obtain a cube (2299968 = 132³).

The spelling of 2740440 in words is "two million, seven hundred forty thousand, four hundred forty".