3811381 has 8 divisors (see below), whose sum is σ = 4585280. Its totient is φ = 3094848.

The previous prime is 3811373. The next prime is 3811387. The reversal of 3811381 is 1831183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3811381 - 2³ = 3811373 is a prime.

It is a super-2 number, since 2×3811381² = 29053250254322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3811387) 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, 14196 + ... + 14461.

It is an arithmetic number, because the mean of its divisors is an integer number (573160).

Almost surely, 2^3811381 is an apocalyptic number.

It is an amenable number.

3811381 is a deficient number, since it is larger than the sum of its proper divisors (773899).

3811381 is a wasteful number, since it uses less digits than its factorization.

3811381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28683.

The product of its digits is 576, while the sum is 25.

The square root of 3811381 is about 1952.2758514103. The cubic root of 3811381 is about 156.2047087930.

The spelling of 3811381 in words is "three million, eight hundred eleven thousand, three hundred eighty-one".