71728058 has 4 divisors (see below), whose sum is σ = 107592090. Its totient is φ = 35864028.

The previous prime is 71728039. The next prime is 71728061. The reversal of 71728058 is 85082717.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 69438889 + 2289169 = 8333^2 + 1513^2 .

It is a super-3 number, since 3×71728058³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17932013 + ... + 17932016.

Almost surely, 2^71728058 is an apocalyptic number.

71728058 is a deficient number, since it is larger than the sum of its proper divisors (35864032).

71728058 is a wasteful number, since it uses less digits than its factorization.

71728058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35864031.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 71728058 is about 8469.2418787044. The cubic root of 71728058 is about 415.4923425580.

The spelling of 71728058 in words is "seventy-one million, seven hundred twenty-eight thousand, fifty-eight".