86187938 has 8 divisors (see below), whose sum is σ = 129408300. Its totient is φ = 43051840.

The previous prime is 86187917. The next prime is 86187979. The reversal of 86187938 is 83978168.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 82864609 + 3323329 = 9103^2 + 1823^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×86187938³ (a number of 25 digits) contains 333 as substring.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 18443 + ... + 22638.

Almost surely, 2^86187938 is an apocalyptic number.

86187938 is a deficient number, since it is larger than the sum of its proper divisors (43220362).

86187938 is a wasteful number, since it uses less digits than its factorization.

86187938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42132.

The product of its digits is 580608, while the sum is 50.

The square root of 86187938 is about 9283.7459034594. The cubic root of 86187938 is about 441.7217969076.

The spelling of 86187938 in words is "eighty-six million, one hundred eighty-seven thousand, nine hundred thirty-eight".