71582138 has 8 divisors (see below), whose sum is σ = 113689332. Its totient is φ = 33685696.

The previous prime is 71582123. The next prime is 71582149. The reversal of 71582138 is 83128517.

It can be written as a sum of positive squares in 2 ways, for example, as 70946929 + 635209 = 8423^2 + 797^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71582098 and 71582107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052645 + ... + 1052712.

Almost surely, 2^71582138 is an apocalyptic number.

71582138 is a deficient number, since it is larger than the sum of its proper divisors (42107194).

71582138 is a wasteful number, since it uses less digits than its factorization.

71582138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105376.

The product of its digits is 13440, while the sum is 35.

The square root of 71582138 is about 8460.6227903151. The cubic root of 71582138 is about 415.2103989498.

The spelling of 71582138 in words is "seventy-one million, five hundred eighty-two thousand, one hundred thirty-eight".