8111988 has 30 divisors (see below), whose sum is σ = 21207186. Its totient is φ = 2703888.

The previous prime is 8111981. The next prime is 8112001. The reversal of 8111988 is 8891118.

It can be written as a sum of positive squares in only one way, i.e., 6906384 + 1205604 = 2628^2 + 1098^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8111981) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12195 + ... + 12842.

Almost surely, 2^8111988 is an apocalyptic number.

It is an amenable number.

8111988 is an abundant number, since it is smaller than the sum of its proper divisors (13095198).

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

8111988 is a wasteful number, since it uses less digits than its factorization.

8111988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25053 (or 25042 counting only the distinct ones).

The product of its digits is 4608, while the sum is 36.

The square root of 8111988 is about 2848.1551924009. The cubic root of 8111988 is about 200.9289122639.

The spelling of 8111988 in words is "eight million, one hundred eleven thousand, nine hundred eighty-eight".