71329568 has 18 divisors (see below), whose sum is σ = 140524209. Its totient is φ = 35640896.

The previous prime is 71329567. The next prime is 71329571. The reversal of 71329568 is 86592317.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 59413264 + 11916304 = 7708^2 + 3452^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5972.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71329567) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 47030 + ... + 48522.

Almost surely, 2^71329568 is an apocalyptic number.

It is an amenable number.

71329568 is a deficient number, since it is larger than the sum of its proper divisors (69194641).

71329568 is an frugal number, since it uses more digits than its factorization.

71329568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 1495 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 71329568 is about 8445.6833944921. The cubic root of 71329568 is about 414.7214814802.

The spelling of 71329568 in words is "seventy-one million, three hundred twenty-nine thousand, five hundred sixty-eight".