3816981 has 24 divisors (see below), whose sum is σ = 6452160. Its totient is φ = 2128896.

The previous prime is 3816979. The next prime is 3817039. The reversal of 3816981 is 1896183.

3816981 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3816981 - 2¹ = 3816979 is a prime.

It is a super-2 number, since 2×3816981² = 29138687908722, which contains 22 as substring.

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

3816981 is strictly pandigital in base 8.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3816941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2005 + ... + 3413.

It is an arithmetic number, because the mean of its divisors is an integer number (268840).

Almost surely, 2^3816981 is an apocalyptic number.

It is an amenable number.

3816981 is a deficient number, since it is larger than the sum of its proper divisors (2635179).

3816981 is a wasteful number, since it uses less digits than its factorization.

3816981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465 (or 1462 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 3816981 is about 1953.7095485256. The cubic root of 3816981 is about 156.2811743665.

The spelling of 3816981 in words is "three million, eight hundred sixteen thousand, nine hundred eighty-one".