3627981 has 12 divisors (see below), whose sum is σ = 5989152. Its totient is φ = 2073096.

The previous prime is 3627979. The next prime is 3627989. The reversal of 3627981 is 1897263.

It is not a de Polignac number, because 3627981 - 2¹ = 3627979 is a prime.

It is a super-2 number, since 2×3627981² = 26324492272722, which contains 22 as substring.

3627981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3627989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28731 + ... + 28856.

It is an arithmetic number, because the mean of its divisors is an integer number (499096).

Almost surely, 2^3627981 is an apocalyptic number.

It is an amenable number.

3627981 is a deficient number, since it is larger than the sum of its proper divisors (2361171).

3627981 is a wasteful number, since it uses less digits than its factorization.

3627981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57600 (or 57597 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 3627981 is about 1904.7259645419. The cubic root of 3627981 is about 153.6579381445.

The spelling of 3627981 in words is "three million, six hundred twenty-seven thousand, nine hundred eighty-one".