3681615 has 24 divisors (see below), whose sum is σ = 6853680. Its totient is φ = 1682688.

The previous prime is 3681599. The next prime is 3681619. The reversal of 3681615 is 5161863.

It is not a de Polignac number, because 3681615 - 2⁴ = 3681599 is a prime.

3681615 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681619) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1770 + ... + 3239.

It is an arithmetic number, because the mean of its divisors is an integer number (285570).

Almost surely, 2^3681615 is an apocalyptic number.

3681615 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3681615 is a deficient number, since it is larger than the sum of its proper divisors (3172065).

3681615 is a wasteful number, since it uses less digits than its factorization.

3681615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031 (or 5024 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 3681615 is about 1918.7535016255. The cubic root of 3681615 is about 154.4114342477.

The spelling of 3681615 in words is "three million, six hundred eighty-one thousand, six hundred fifteen".