3956381 has 16 divisors (see below), whose sum is σ = 4724160. Its totient is φ = 3265920.

The previous prime is 3956353. The next prime is 3956401. The reversal of 3956381 is 1836593.

It is a cyclic number.

It is not a de Polignac number, because 3956381 - 2¹⁴ = 3939997 is a prime.

It is a super-2 number, since 2×3956381² = 31305901234322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3956311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10250 + ... + 10628.

It is an arithmetic number, because the mean of its divisors is an integer number (295260).

Almost surely, 2^3956381 is an apocalyptic number.

It is an amenable number.

3956381 is a deficient number, since it is larger than the sum of its proper divisors (767779).

3956381 is a wasteful number, since it uses less digits than its factorization.

3956381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476.

The product of its digits is 19440, while the sum is 35.

The square root of 3956381 is about 1989.0653584033. The cubic root of 3956381 is about 158.1609879708.

It can be divided in two parts, 395 and 6381, that added together give a palindrome (6776).

The spelling of 3956381 in words is "three million, nine hundred fifty-six thousand, three hundred eighty-one".