7871003778 has 24 divisors (see below), whose sum is σ = 17303199984. Its totient is φ = 2385152440.

The previous prime is 7871003759. The next prime is 7871003807. The reversal of 7871003778 is 8773001787.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5420076 + ... + 5421527.

It is an arithmetic number, because the mean of its divisors is an integer number (720966666).

Almost surely, 2^7871003778 is an apocalyptic number.

7871003778 is an abundant number, since it is smaller than the sum of its proper divisors (9432196206).

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

7871003778 is a wasteful number, since it uses less digits than its factorization.

7871003778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10841630 (or 10841619 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 48.

The square root of 7871003778 is about 88718.6777291005. The cubic root of 7871003778 is about 1989.1920137591.

The spelling of 7871003778 in words is "seven billion, eight hundred seventy-one million, three thousand, seven hundred seventy-eight".