2855140 has 12 divisors (see below), whose sum is σ = 5995836. Its totient is φ = 1142048.

The previous prime is 2855129. The next prime is 2855141. The reversal of 2855140 is 415582.

It can be written as a sum of positive squares in 2 ways, for example, as 850084 + 2005056 = 922^2 + 1416^2 .

It is not an unprimeable number, because it can be changed into a prime (2855141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71359 + ... + 71398.

It is an arithmetic number, because the mean of its divisors is an integer number (499653).

2^2855140 is an apocalyptic number.

2855140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2855140 is an abundant number, since it is smaller than the sum of its proper divisors (3140696).

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

2855140 is a wasteful number, since it uses less digits than its factorization.

2855140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142766 (or 142764 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 2855140 is about 1689.7159524606. The cubic root of 2855140 is about 141.8651765340.

The spelling of 2855140 in words is "two million, eight hundred fifty-five thousand, one hundred forty".