86787918 has 48 divisors (see below), whose sum is σ = 219304800. Its totient is φ = 24794784.

The previous prime is 86787859. The next prime is 86787929. The reversal of 86787918 is 81978768.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 855 + ... + 13202.

It is an arithmetic number, because the mean of its divisors is an integer number (4568850).

Almost surely, 2^86787918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86787918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109652400).

86787918 is an abundant number, since it is smaller than the sum of its proper divisors (132516882).

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

86787918 is a wasteful number, since it uses less digits than its factorization.

86787918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14086 (or 14069 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 86787918 is about 9316.0033276078. The cubic root of 86787918 is about 442.7444134755.

The spelling of 86787918 in words is "eighty-six million, seven hundred eighty-seven thousand, nine hundred eighteen".