87866118 has 48 divisors (see below), whose sum is σ = 199536480. Its totient is φ = 27891072.

The previous prime is 87866117. The next prime is 87866147. The reversal of 87866118 is 81166878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87866111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154138 + ... + 154706.

It is an arithmetic number, because the mean of its divisors is an integer number (4157010).

Almost surely, 2^87866118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87866118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99768240).

87866118 is an abundant number, since it is smaller than the sum of its proper divisors (111670362).

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

87866118 is a wasteful number, since it uses less digits than its factorization.

87866118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 970 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 87866118 is about 9373.6928688751. The cubic root of 87866118 is about 444.5703347591.

The spelling of 87866118 in words is "eighty-seven million, eight hundred sixty-six thousand, one hundred eighteen".