2865040 has 40 divisors (see below), whose sum is σ = 6785280. Its totient is φ = 1124736.

The previous prime is 2865007. The next prime is 2865043. The reversal of 2865040 is 405682.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 2864996 and 2865014.

It is not an unprimeable number, because it can be changed into a prime (2865043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4417 + ... + 5023.

It is an arithmetic number, because the mean of its divisors is an integer number (169632).

2^2865040 is an apocalyptic number.

2865040 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 2865040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3392640).

2865040 is an abundant number, since it is smaller than the sum of its proper divisors (3920240).

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

2865040 is a wasteful number, since it uses less digits than its factorization.

2865040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2865040 is about 1692.6429038637. The cubic root of 2865040 is about 142.0289566022.

The spelling of 2865040 in words is "two million, eight hundred sixty-five thousand, forty".