8988542778 has 32 divisors (see below), whose sum is σ = 18083463552. Its totient is φ = 2978496000.

The previous prime is 8988542767. The next prime is 8988542831. The reversal of 8988542778 is 8772458898.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 863875 + ... + 874217.

It is an arithmetic number, because the mean of its divisors is an integer number (565108236).

Almost surely, 2^8988542778 is an apocalyptic number.

8988542778 is an abundant number, since it is smaller than the sum of its proper divisors (9094920774).

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

8988542778 is a wasteful number, since it uses less digits than its factorization.

8988542778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11190.

The product of its digits is 72253440, while the sum is 66.

The square root of 8988542778 is about 94807.9257129909. The cubic root of 8988542778 is about 2079.2007822298.

The spelling of 8988542778 in words is "eight billion, nine hundred eighty-eight million, five hundred forty-two thousand, seven hundred seventy-eight".