2745540 has 72 divisors (see below), whose sum is σ = 9522240. Its totient is φ = 627264.

The previous prime is 2745529. The next prime is 2745541. The reversal of 2745540 is 455472.

It is not an unprimeable number, because it can be changed into a prime (2745541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171 + ... + 2349.

2^2745540 is an apocalyptic number.

2745540 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 2745540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4761120).

2745540 is an abundant number, since it is smaller than the sum of its proper divisors (6776700).

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

2745540 is a wasteful number, since it uses less digits than its factorization.

2745540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201 (or 2196 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 2745540 is about 1656.9671089071. The cubic root of 2745540 is about 140.0261855781.

It can be divided in two parts, 27455 and 40, that added together give a triangular number (27495 = T₂₃₄).

The spelling of 2745540 in words is "two million, seven hundred forty-five thousand, five hundred forty".