3871390 has 16 divisors (see below), whose sum is σ = 7117632. Its totient is φ = 1515424.

The previous prime is 3871381. The next prime is 3871391. The reversal of 3871390 is 931783.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871391) 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, 3649 + ... + 4588.

It is an arithmetic number, because the mean of its divisors is an integer number (444852).

Almost surely, 2^3871390 is an apocalyptic number.

3871390 is a deficient number, since it is larger than the sum of its proper divisors (3246242).

3871390 is a wasteful number, since it uses less digits than its factorization.

3871390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8291.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 3871390 is about 1967.5848139280. The cubic root of 3871390 is about 157.0202416192.

The spelling of 3871390 in words is "three million, eight hundred seventy-one thousand, three hundred ninety".