3854120871 has 4 divisors (see below), whose sum is σ = 5138827832. Its totient is φ = 2569413912.

The previous prime is 3854120857. The next prime is 3854120887. The reversal of 3854120871 is 1780214583.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3854120871 - 2¹¹ = 3854118823 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 (3854120471) 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, 642353476 + ... + 642353481.

It is an arithmetic number, because the mean of its divisors is an integer number (1284706958).

Almost surely, 2^3854120871 is an apocalyptic number.

3854120871 is a deficient number, since it is larger than the sum of its proper divisors (1284706961).

3854120871 is a wasteful number, since it uses less digits than its factorization.

3854120871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284706960.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 3854120871 is about 62081.5662737338. The cubic root of 3854120871 is about 1567.8641994129.

The spelling of 3854120871 in words is "three billion, eight hundred fifty-four million, one hundred twenty thousand, eight hundred seventy-one".