4878987891 has 8 divisors (see below), whose sum is σ = 6643728384. Its totient is φ = 3183453000.

The previous prime is 4878987881. The next prime is 4878987929. The reversal of 4878987891 is 1987898784.

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

It is not a de Polignac number, because 4878987891 - 2⁵ = 4878987859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4878987821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17301235 + ... + 17301516.

It is an arithmetic number, because the mean of its divisors is an integer number (830466048).

Almost surely, 2^4878987891 is an apocalyptic number.

4878987891 is a deficient number, since it is larger than the sum of its proper divisors (1764740493).

4878987891 is a wasteful number, since it uses less digits than its factorization.

4878987891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34602801.

The product of its digits is 65028096, while the sum is 69.

The square root of 4878987891 is about 69849.7522615506. The cubic root of 4878987891 is about 1696.0679469995.

The spelling of 4878987891 in words is "four billion, eight hundred seventy-eight million, nine hundred eighty-seven thousand, eight hundred ninety-one".