3871830 has 16 divisors (see below), whose sum is σ = 9292464. Its totient is φ = 1032480.

The previous prime is 3871823. The next prime is 3871831. The reversal of 3871830 is 381783.

3871830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 129061 = 3871830 / (3 + 8 + 7 + 1 + 8 + 3 + 0).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64501 + ... + 64560.

It is an arithmetic number, because the mean of its divisors is an integer number (580779).

Almost surely, 2^3871830 is an apocalyptic number.

3871830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3871830 is an abundant number, since it is smaller than the sum of its proper divisors (5420634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3871830 is a wasteful number, since it uses less digits than its factorization.

3871830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129071.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 3871830 is about 1967.6966229579. The cubic root of 3871830 is about 157.0261900674.

The spelling of 3871830 in words is "three million, eight hundred seventy-one thousand, eight hundred thirty".