3656520 has 96 divisors (see below), whose sum is σ = 13590720. Its totient is φ = 835200.

The previous prime is 3656509. The next prime is 3656537. The reversal of 3656520 is 256563.

3656520 is a `hidden beast` number, since 3 + 6 + 5 + 652 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1795 + ... + 3245.

It is an arithmetic number, because the mean of its divisors is an integer number (141570).

Almost surely, 2^3656520 is an apocalyptic number.

3656520 is a gapful number since it is divisible by the number (30) 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 3656520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6795360).

3656520 is an abundant number, since it is smaller than the sum of its proper divisors (9934200).

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

3656520 is a wasteful number, since it uses less digits than its factorization.

3656520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 3656520 is about 1912.2029181026. The cubic root of 3656520 is about 154.0597957482.

It can be divided in two parts, 36565 and 20, that added together give a triangular number (36585 = T₂₇₀).

The spelling of 3656520 in words is "three million, six hundred fifty-six thousand, five hundred twenty".