86428181 has 16 divisors (see below), whose sum is σ = 103680000. Its totient is φ = 70441008.

The previous prime is 86428141. The next prime is 86428193. The reversal of 86428181 is 18182468.

It is a cyclic number.

It is not a de Polignac number, because 86428181 - 2⁶ = 86428117 is a prime.

It is a super-2 number, since 2×86428181² = 14939660941937522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86428141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27320 + ... + 30318.

It is an arithmetic number, because the mean of its divisors is an integer number (6480000).

Almost surely, 2^86428181 is an apocalyptic number.

It is an amenable number.

86428181 is a deficient number, since it is larger than the sum of its proper divisors (17251819).

86428181 is a wasteful number, since it uses less digits than its factorization.

86428181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208.

The product of its digits is 24576, while the sum is 38.

The square root of 86428181 is about 9296.6758037483. The cubic root of 86428181 is about 442.1318392841.

The spelling of 86428181 in words is "eighty-six million, four hundred twenty-eight thousand, one hundred eighty-one".