8981988 has 12 divisors (see below), whose sum is σ = 20958000. Its totient is φ = 2993992.

The previous prime is 8981981. The next prime is 8981989. The reversal of 8981988 is 8891898.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×8981988² = 161352216864288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8981988.

It is not an unprimeable number, because it can be changed into a prime (8981981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374238 + ... + 374261.

It is an arithmetic number, because the mean of its divisors is an integer number (1746500).

Almost surely, 2^8981988 is an apocalyptic number.

It is an amenable number.

8981988 is an abundant number, since it is smaller than the sum of its proper divisors (11976012).

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

8981988 is a wasteful number, since it uses less digits than its factorization.

8981988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748506 (or 748504 counting only the distinct ones).

The product of its digits is 331776, while the sum is 51.

The square root of 8981988 is about 2996.9964964944. The cubic root of 8981988 is about 207.8695249276.

The spelling of 8981988 in words is "eight million, nine hundred eighty-one thousand, nine hundred eighty-eight".