7871871938 has 8 divisors (see below), whose sum is σ = 13494637632. Its totient is φ = 3373659396.

The previous prime is 7871871937. The next prime is 7871871949. The reversal of 7871871938 is 8391781787.

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

It is not an unprimeable number, because it can be changed into a prime (7871871937) 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, 281138270 + ... + 281138297.

It is an arithmetic number, because the mean of its divisors is an integer number (1686829704).

Almost surely, 2^7871871938 is an apocalyptic number.

7871871938 is a deficient number, since it is larger than the sum of its proper divisors (5622765694).

7871871938 is a wasteful number, since it uses less digits than its factorization.

7871871938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562276576.

The product of its digits is 4741632, while the sum is 59.

The square root of 7871871938 is about 88723.5703632355. The cubic root of 7871871938 is about 1989.2651460430.

The spelling of 7871871938 in words is "seven billion, eight hundred seventy-one million, eight hundred seventy-one thousand, nine hundred thirty-eight".