2871540 has 144 divisors (see below), whose sum is σ = 10378368. Its totient is φ = 628992.

The previous prime is 2871509. The next prime is 2871563. The reversal of 2871540 is 451782.

2871540 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

2871540 is strictly pandigital in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54154 + ... + 54206.

It is an arithmetic number, because the mean of its divisors is an integer number (72072).

2^2871540 is an apocalyptic number.

2871540 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 2871540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5189184).

2871540 is an abundant number, since it is smaller than the sum of its proper divisors (7506828).

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

2871540 is a wasteful number, since it uses less digits than its factorization.

2871540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2871540 is about 1694.5618902831. The cubic root of 2871540 is about 142.1362838928.

The spelling of 2871540 in words is "two million, eight hundred seventy-one thousand, five hundred forty".