3621986 has 16 divisors (see below), whose sum is σ = 5787936. Its totient is φ = 1694016.

The previous prime is 3621983. The next prime is 3622001. The reversal of 3621986 is 6891263.

It is not an unprimeable number, because it can be changed into a prime (3621983) 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, 10265 + ... + 10611.

It is an arithmetic number, because the mean of its divisors is an integer number (361746).

Almost surely, 2^3621986 is an apocalyptic number.

3621986 is a deficient number, since it is larger than the sum of its proper divisors (2165950).

3621986 is a wasteful number, since it uses less digits than its factorization.

3621986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673.

The product of its digits is 15552, while the sum is 35.

The square root of 3621986 is about 1903.1515966943. The cubic root of 3621986 is about 153.5732549372.

It can be divided in two parts, 36 and 21986, that added together give a palindrome (22022).

The spelling of 3621986 in words is "three million, six hundred twenty-one thousand, nine hundred eighty-six".