2878540 has 48 divisors (see below), whose sum is σ = 7156800. Its totient is φ = 951552.

The previous prime is 2878537. The next prime is 2878543. The reversal of 2878540 is 458782.

It is an interprime number because it is at equal distance from previous prime (2878537) and next prime (2878543).

It is a junction number, because it is equal to n+sod(n) for n = 2878496 and 2878505.

It is not an unprimeable number, because it can be changed into a prime (2878543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3706 + ... + 4414.

It is an arithmetic number, because the mean of its divisors is an integer number (149100).

2^2878540 is an apocalyptic number.

2878540 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 2878540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3578400).

2878540 is an abundant number, since it is smaller than the sum of its proper divisors (4278260).

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

2878540 is a wasteful number, since it uses less digits than its factorization.

2878540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 752 counting only the distinct ones).

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

The square root of 2878540 is about 1696.6260636923. The cubic root of 2878540 is about 142.2516861518.

The spelling of 2878540 in words is "two million, eight hundred seventy-eight thousand, five hundred forty".