86744138 has 32 divisors (see below), whose sum is σ = 145539072. Its totient is φ = 38505600.

The previous prime is 86744131. The next prime is 86744159. The reversal of 86744138 is 83144768.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 86744095 and 86744104.

It is not an unprimeable number, because it can be changed into a prime (86744131) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 226295 + ... + 226677.

It is an arithmetic number, because the mean of its divisors is an integer number (4548096).

Almost surely, 2^86744138 is an apocalyptic number.

86744138 is a deficient number, since it is larger than the sum of its proper divisors (58794934).

86744138 is a wasteful number, since it uses less digits than its factorization.

86744138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710.

The product of its digits is 129024, while the sum is 41.

The square root of 86744138 is about 9313.6533111341. The cubic root of 86744138 is about 442.6699537616.

The spelling of 86744138 in words is "eighty-six million, seven hundred forty-four thousand, one hundred thirty-eight".