71399712 has 24 divisors (see below), whose sum is σ = 187424496. Its totient is φ = 23799872.

The previous prime is 71399683. The next prime is 71399719. The reversal of 71399712 is 21799317.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (71399719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371778 + ... + 371969.

It is an arithmetic number, because the mean of its divisors is an integer number (7809354).

Almost surely, 2^71399712 is an apocalyptic number.

It is an amenable number.

71399712 is an abundant number, since it is smaller than the sum of its proper divisors (116024784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71399712 is a wasteful number, since it uses less digits than its factorization.

71399712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743760 (or 743752 counting only the distinct ones).

The product of its digits is 23814, while the sum is 39.

The square root of 71399712 is about 8449.8350279754. The cubic root of 71399712 is about 414.8573797434.

The spelling of 71399712 in words is "seventy-one million, three hundred ninety-nine thousand, seven hundred twelve".