3876381 has 6 divisors (see below), whose sum is σ = 5599230. Its totient is φ = 2584248.

The previous prime is 3876371. The next prime is 3876403. The reversal of 3876381 is 1836783.

It can be written as a sum of positive squares in only one way, i.e., 3767481 + 108900 = 1941^2 + 330^2 .

It is not a de Polignac number, because 3876381 - 2⁶ = 3876317 is a prime.

It is a super-3 number, since 3×3876381³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3876311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215346 + ... + 215363.

It is an arithmetic number, because the mean of its divisors is an integer number (933205).

Almost surely, 2^3876381 is an apocalyptic number.

It is an amenable number.

3876381 is a deficient number, since it is larger than the sum of its proper divisors (1722849).

3876381 is a wasteful number, since it uses less digits than its factorization.

3876381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430715 (or 430712 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 3876381 is about 1968.8527116064. The cubic root of 3876381 is about 157.0876895289.

The spelling of 3876381 in words is "three million, eight hundred seventy-six thousand, three hundred eighty-one".