8993988 has 18 divisors (see below), whose sum is σ = 22734894. Its totient is φ = 2997984.

The previous prime is 8993981. The next prime is 8994017. The reversal of 8993988 is 8893998.

It can be written as a sum of positive squares in only one way, i.e., 6110784 + 2883204 = 2472^2 + 1698^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (8993981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124881 + ... + 124952.

Almost surely, 2^8993988 is an apocalyptic number.

It is an amenable number.

8993988 is an abundant number, since it is smaller than the sum of its proper divisors (13740906).

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

8993988 is a wasteful number, since it uses less digits than its factorization.

8993988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249843 (or 249838 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 8993988 is about 2998.9978326101. The cubic root of 8993988 is about 207.9620554551.

The spelling of 8993988 in words is "eight million, nine hundred ninety-three thousand, nine hundred eighty-eight".