3681618 has 16 divisors (see below), whose sum is σ = 7390656. Its totient is φ = 1222640.

The previous prime is 3681599. The next prime is 3681619. The reversal of 3681618 is 8161863.

It is a super-2 number, since 2×3681618² = 27108622195848, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 880 + ... + 2852.

It is an arithmetic number, because the mean of its divisors is an integer number (461916).

Almost surely, 2^3681618 is an apocalyptic number.

3681618 is an abundant number, since it is smaller than the sum of its proper divisors (3709038).

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

3681618 is a wasteful number, since it uses less digits than its factorization.

3681618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289.

The product of its digits is 6912, while the sum is 33.

The square root of 3681618 is about 1918.7542833828. The cubic root of 3681618 is about 154.4114761889.

The spelling of 3681618 in words is "three million, six hundred eighty-one thousand, six hundred eighteen".