3655860 has 96 divisors (see below), whose sum is σ = 11383680. Its totient is φ = 870912.

The previous prime is 3655849. The next prime is 3655877. The reversal of 3655860 is 685563.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33486 + ... + 33594.

It is an arithmetic number, because the mean of its divisors is an integer number (118580).

Almost surely, 2^3655860 is an apocalyptic number.

3655860 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 3655860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5691840).

3655860 is an abundant number, since it is smaller than the sum of its proper divisors (7727820).

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

3655860 is a wasteful number, since it uses less digits than its factorization.

3655860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 3655860 is about 1912.0303344874. The cubic root of 3655860 is about 154.0505259522.

The spelling of 3655860 in words is "three million, six hundred fifty-five thousand, eight hundred sixty".