3721618 has 8 divisors (see below), whose sum is σ = 5609520. Its totient is φ = 1851780.

The previous prime is 3721603. The next prime is 3721621. The reversal of 3721618 is 8161273.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 3988 + ... + 4831.

It is an arithmetic number, because the mean of its divisors is an integer number (701190).

Almost surely, 2^3721618 is an apocalyptic number.

3721618 is a deficient number, since it is larger than the sum of its proper divisors (1887902).

3721618 is a wasteful number, since it uses less digits than its factorization.

3721618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9032.

The product of its digits is 2016, while the sum is 28.

The square root of 3721618 is about 1929.1495535598. The cubic root of 3721618 is about 154.9686790685.

The spelling of 3721618 in words is "three million, seven hundred twenty-one thousand, six hundred eighteen".