3818981 has 12 divisors (see below), whose sum is σ = 4180800. Its totient is φ = 3478608.

The previous prime is 3818977. The next prime is 3819007. The reversal of 3818981 is 1898183.

It is not a de Polignac number, because 3818981 - 2² = 3818977 is a prime.

It is a super-2 number, since 2×3818981² = 29169231756722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3818951) 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, 15860 + ... + 16098.

It is an arithmetic number, because the mean of its divisors is an integer number (348400).

Almost surely, 2^3818981 is an apocalyptic number.

It is an amenable number.

3818981 is a deficient number, since it is larger than the sum of its proper divisors (361819).

3818981 is a wasteful number, since it uses less digits than its factorization.

3818981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 287 counting only the distinct ones).

The product of its digits is 13824, while the sum is 38.

The square root of 3818981 is about 1954.2213283044. The cubic root of 3818981 is about 156.3084653741.

The spelling of 3818981 in words is "three million, eight hundred eighteen thousand, nine hundred eighty-one".