86985918 has 12 divisors (see below), whose sum is σ = 188469528. Its totient is φ = 28995300.

The previous prime is 86985917. The next prime is 86985929. The reversal of 86985918 is 81958968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86985911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2416258 + ... + 2416293.

It is an arithmetic number, because the mean of its divisors is an integer number (15705794).

Almost surely, 2^86985918 is an apocalyptic number.

86985918 is an abundant number, since it is smaller than the sum of its proper divisors (101483610).

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

86985918 is a wasteful number, since it uses less digits than its factorization.

86985918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832559 (or 4832556 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 86985918 is about 9326.6241481042. The cubic root of 86985918 is about 443.0808535948.

The spelling of 86985918 in words is "eighty-six million, nine hundred eighty-five thousand, nine hundred eighteen".