3681620 has 12 divisors (see below), whose sum is σ = 7731444. Its totient is φ = 1472640.

The previous prime is 3681619. The next prime is 3681683. The reversal of 3681620 is 261863.

It can be written as a sum of positive squares in 2 ways, for example, as 2114116 + 1567504 = 1454^2 + 1252^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3681620.

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, 92021 + ... + 92060.

It is an arithmetic number, because the mean of its divisors is an integer number (644287).

Almost surely, 2^3681620 is an apocalyptic number.

It is an amenable number.

3681620 is an abundant number, since it is smaller than the sum of its proper divisors (4049824).

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

3681620 is a wasteful number, since it uses less digits than its factorization.

3681620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184090 (or 184088 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 3681620 is about 1918.7548045542. The cubic root of 3681620 is about 154.4115041497.

The spelling of 3681620 in words is "three million, six hundred eighty-one thousand, six hundred twenty".