3871690 has 8 divisors (see below), whose sum is σ = 6969060. Its totient is φ = 1548672.

The previous prime is 3871669. The next prime is 3871691. The reversal of 3871690 is 961783.

It can be written as a sum of positive squares in 2 ways, for example, as 3869089 + 2601 = 1967^2 + 51^2 .

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

It is a super-2 number, since 2×3871690² = 29979966912200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3871691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193575 + ... + 193594.

Almost surely, 2^3871690 is an apocalyptic number.

3871690 is a deficient number, since it is larger than the sum of its proper divisors (3097370).

3871690 is a wasteful number, since it uses less digits than its factorization.

3871690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387176.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 3871690 is about 1967.6610480466. The cubic root of 3871690 is about 157.0242974282.

The spelling of 3871690 in words is "three million, eight hundred seventy-one thousand, six hundred ninety".