2785520 has 20 divisors (see below), whose sum is σ = 6476520. Its totient is φ = 1114176.

The previous prime is 2785513. The next prime is 2785577. The reversal of 2785520 is 255872.

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

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17330 + ... + 17489.

It is an arithmetic number, because the mean of its divisors is an integer number (323826).

2^2785520 is an apocalyptic number.

2785520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2785520 is an abundant number, since it is smaller than the sum of its proper divisors (3691000).

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

2785520 is a wasteful number, since it uses less digits than its factorization.

2785520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34832 (or 34826 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 2785520 is about 1668.9877171507. The cubic root of 2785520 is about 140.7025905967.

The spelling of 2785520 in words is "two million, seven hundred eighty-five thousand, five hundred twenty".