3920871 has 16 divisors (see below), whose sum is σ = 5419008. Its totient is φ = 2520000.

The previous prime is 3920867. The next prime is 3920899. The reversal of 3920871 is 1780293.

It is a happy number.

It is not a de Polignac number, because 3920871 - 2² = 3920867 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15496 + ... + 15746.

It is an arithmetic number, because the mean of its divisors is an integer number (338688).

Almost surely, 2^3920871 is an apocalyptic number.

3920871 is a deficient number, since it is larger than the sum of its proper divisors (1498137).

3920871 is a wasteful number, since it uses less digits than its factorization.

3920871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 3920871 is about 1980.1189358218. The cubic root of 3920871 is about 157.6863805152.

It can be divided in two parts, 39 and 20871, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 3920871 in words is "three million, nine hundred twenty thousand, eight hundred seventy-one".