87111192 has 64 divisors (see below), whose sum is σ = 252334080. Its totient is φ = 24544512.

The previous prime is 87111191. The next prime is 87111197. The reversal of 87111192 is 29111178.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87111191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8713 + ... + 15815.

It is an arithmetic number, because the mean of its divisors is an integer number (3942720).

Almost surely, 2^87111192 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 87111192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126167040).

87111192 is an abundant number, since it is smaller than the sum of its proper divisors (165222888).

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

87111192 is a wasteful number, since it uses less digits than its factorization.

87111192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7192 (or 7188 counting only the distinct ones).

The product of its digits is 1008, while the sum is 30.

The square root of 87111192 is about 9333.3376666657. The cubic root of 87111192 is about 443.2934546199.

The spelling of 87111192 in words is "eighty-seven million, one hundred eleven thousand, one hundred ninety-two".