87111156 has 48 divisors (see below), whose sum is σ = 224437248. Its totient is φ = 26076000.

The previous prime is 87111131. The next prime is 87111169. The reversal of 87111156 is 65111178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6981 + ... + 14931.

It is an arithmetic number, because the mean of its divisors is an integer number (4675776).

Almost surely, 2^87111156 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 87111156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112218624).

87111156 is an abundant number, since it is smaller than the sum of its proper divisors (137326092).

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

87111156 is a wasteful number, since it uses less digits than its factorization.

87111156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8052 (or 8050 counting only the distinct ones).

The product of its digits is 1680, while the sum is 30.

The square root of 87111156 is about 9333.3357380949. The cubic root of 87111156 is about 443.2933935540.

The spelling of 87111156 in words is "eighty-seven million, one hundred eleven thousand, one hundred fifty-six".