2785540 has 48 divisors (see below), whose sum is σ = 6209280. Its totient is φ = 1048320.

The previous prime is 2785513. The next prime is 2785577. The reversal of 2785540 is 455872.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35221 + ... + 35299.

It is an arithmetic number, because the mean of its divisors is an integer number (129360).

2^2785540 is an apocalyptic number.

2785540 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 2785540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3104640).

2785540 is an abundant number, since it is smaller than the sum of its proper divisors (3423740).

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

2785540 is a wasteful number, since it uses less digits than its factorization.

2785540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 2785540 is about 1668.9937087958. The cubic root of 2785540 is about 140.7029273436.

The spelling of 2785540 in words is "two million, seven hundred eighty-five thousand, five hundred forty".