2887540 has 24 divisors (see below), whose sum is σ = 6095880. Its totient is φ = 1148928.

The previous prime is 2887537. The next prime is 2887541. The reversal of 2887540 is 457882.

2887540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 708964 + 2178576 = 842^2 + 1476^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2887496 and 2887505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2887541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6856 + ... + 7264.

It is an arithmetic number, because the mean of its divisors is an integer number (253995).

2^2887540 is an apocalyptic number.

2887540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2887540 is an abundant number, since it is smaller than the sum of its proper divisors (3208340).

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

2887540 is a wasteful number, since it uses less digits than its factorization.

2887540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 2887540 is about 1699.2763165536. The cubic root of 2887540 is about 142.3997859063.

The spelling of 2887540 in words is "two million, eight hundred eighty-seven thousand, five hundred forty".