71158538 has 16 divisors (see below), whose sum is σ = 116574336. Its totient is φ = 32307840.

The previous prime is 71158537. The next prime is 71158597. The reversal of 71158538 is 83585117.

It is not an unprimeable number, because it can be changed into a prime (71158537) 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 7 ways as a sum of consecutive naturals, for example, 30170 + ... + 32442.

It is an arithmetic number, because the mean of its divisors is an integer number (7285896).

Almost surely, 2^71158538 is an apocalyptic number.

71158538 is a deficient number, since it is larger than the sum of its proper divisors (45415798).

71158538 is a wasteful number, since it uses less digits than its factorization.

71158538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709.

The product of its digits is 33600, while the sum is 38.

The square root of 71158538 is about 8435.5520269867. The cubic root of 71158538 is about 414.3897509739.

The spelling of 71158538 in words is "seventy-one million, one hundred fifty-eight thousand, five hundred thirty-eight".