7868787858 has 96 divisors (see below), whose sum is σ = 18374159232. Its totient is φ = 2424844800.

The previous prime is 7868787847. The next prime is 7868787869. The reversal of 7868787858 is 8587878687.

It is an interprime number because it is at equal distance from previous prime (7868787847) and next prime (7868787869).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8103313 + ... + 8104283.

It is an arithmetic number, because the mean of its divisors is an integer number (191397492).

Almost surely, 2^7868787858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7868787858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9187079616).

7868787858 is an abundant number, since it is smaller than the sum of its proper divisors (10505371374).

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

7868787858 is a wasteful number, since it uses less digits than its factorization.

7868787858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440 (or 1437 counting only the distinct ones).

The product of its digits is 337182720, while the sum is 72.

The square root of 7868787858 is about 88706.1883861549. The cubic root of 7868787858 is about 1989.0053241404.

The spelling of 7868787858 in words is "seven billion, eight hundred sixty-eight million, seven hundred eighty-seven thousand, eight hundred fifty-eight".