3881405 has 8 divisors (see below), whose sum is σ = 5081184. Its totient is φ = 2822800.

The previous prime is 3881393. The next prime is 3881407. The reversal of 3881405 is 5041883.

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

It is not a de Polignac number, because 3881405 - 2⁶ = 3881341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881407) 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, 35231 + ... + 35340.

It is an arithmetic number, because the mean of its divisors is an integer number (635148).

Almost surely, 2^3881405 is an apocalyptic number.

It is an amenable number.

3881405 is a deficient number, since it is larger than the sum of its proper divisors (1199779).

3881405 is a wasteful number, since it uses less digits than its factorization.

3881405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70587.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 3881405 is about 1970.1281684195. The cubic root of 3881405 is about 157.1555249528.

The spelling of 3881405 in words is "three million, eight hundred eighty-one thousand, four hundred five".