87981184 has 32 divisors (see below), whose sum is σ = 177908400. Its totient is φ = 43329792.

The previous prime is 87981181. The next prime is 87981199. The reversal of 87981184 is 48118978.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (87981181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3447 + ... + 13705.

Almost surely, 2^87981184 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87981184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88954200).

87981184 is an abundant number, since it is smaller than the sum of its proper divisors (89927216).

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

87981184 is a wasteful number, since it uses less digits than its factorization.

87981184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10340 (or 10328 counting only the distinct ones).

The product of its digits is 129024, while the sum is 46.

The square root of 87981184 is about 9379.8285698620. The cubic root of 87981184 is about 444.7643140288.

The spelling of 87981184 in words is "eighty-seven million, nine hundred eighty-one thousand, one hundred eighty-four".