71328538 has 8 divisors (see below), whose sum is σ = 107939988. Its totient is φ = 35348544.

The previous prime is 71328449. The next prime is 71328559. The reversal of 71328538 is 83582317.

It can be written as a sum of positive squares in 2 ways, for example, as 61575409 + 9753129 = 7847^2 + 3123^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 71328497 and 71328506.

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, 157581 + ... + 158032.

Almost surely, 2^71328538 is an apocalyptic number.

71328538 is a deficient number, since it is larger than the sum of its proper divisors (36611450).

71328538 is a wasteful number, since it uses less digits than its factorization.

71328538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315728.

The product of its digits is 40320, while the sum is 37.

The square root of 71328538 is about 8445.6224163764. The cubic root of 71328538 is about 414.7194852758.

The spelling of 71328538 in words is "seventy-one million, three hundred twenty-eight thousand, five hundred thirty-eight".