8981987188 has 12 divisors (see below), whose sum is σ = 15719199300. Its totient is φ = 4490787392.

The previous prime is 8981987171. The next prime is 8981987227. The reversal of 8981987188 is 8817891898.

It can be written as a sum of positive squares in 2 ways, for example, as 7908900624 + 1073086564 = 88932^2 + 32758^2 .

It is a super-2 number, since 2×8981987188² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89088 + ... + 160936.

It is an arithmetic number, because the mean of its divisors is an integer number (1309933275).

Almost surely, 2^8981987188 is an apocalyptic number.

It is an amenable number.

8981987188 is a deficient number, since it is larger than the sum of its proper divisors (6737212112).

8981987188 is a wasteful number, since it uses less digits than its factorization.

8981987188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103106 (or 103104 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 67.

The square root of 8981987188 is about 94773.3464007682. The cubic root of 8981987188 is about 2078.6951866359.

The spelling of 8981987188 in words is "eight billion, nine hundred eighty-one million, nine hundred eighty-seven thousand, one hundred eighty-eight".