2685520 has 20 divisors (see below), whose sum is σ = 6244020. Its totient is φ = 1074176.

The previous prime is 2685511. The next prime is 2685521. The reversal of 2685520 is 255862.

It can be written as a sum of positive squares in 2 ways, for example, as 506944 + 2178576 = 712^2 + 1476^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685521) 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, 16705 + ... + 16864.

It is an arithmetic number, because the mean of its divisors is an integer number (312201).

2^2685520 is an apocalyptic number.

2685520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2685520 is an abundant number, since it is smaller than the sum of its proper divisors (3558500).

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

2685520 is a wasteful number, since it uses less digits than its factorization.

2685520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33582 (or 33576 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2685520 is about 1638.7556254671. The cubic root of 2685520 is about 138.9982919929.

The spelling of 2685520 in words is "two million, six hundred eighty-five thousand, five hundred twenty".