2731040 has 72 divisors (see below), whose sum is σ = 7055748. Its totient is φ = 998400.

The previous prime is 2731013. The next prime is 2731049. The reversal of 2731040 is 401372.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 913936 + 1817104 = 956^2 + 1348^2 .

It is not an unprimeable number, because it can be changed into a prime (2731049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26990 + ... + 27090.

2^2731040 is an apocalyptic number.

2731040 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 2731040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3527874).

2731040 is an abundant number, since it is smaller than the sum of its proper divisors (4324708).

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

2731040 is a wasteful number, since it uses less digits than its factorization.

2731040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 2731040 is about 1652.5858525354. The cubic root of 2731040 is about 139.7792439251.

The spelling of 2731040 in words is "two million, seven hundred thirty-one thousand, forty".