2724640 has 24 divisors (see below), whose sum is σ = 6437340. Its totient is φ = 1089792.

The previous prime is 2724629. The next prime is 2724653. The reversal of 2724640 is 464272.

It can be written as a sum of positive squares in 2 ways, for example, as 2702736 + 21904 = 1644^2 + 148^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8355 + ... + 8674.

2^2724640 is an apocalyptic number.

2724640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2724640 is an abundant number, since it is smaller than the sum of its proper divisors (3712700).

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

2724640 is a wasteful number, since it uses less digits than its factorization.

2724640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17044 (or 17036 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 2724640 is about 1650.6483574644. The cubic root of 2724640 is about 139.6699709164.

It can be divided in two parts, 2724 and 640, that added together give a square (3364 = 58²).

The spelling of 2724640 in words is "two million, seven hundred twenty-four thousand, six hundred forty".