71685672 has 32 divisors (see below), whose sum is σ = 179431200. Its totient is φ = 23866304.

The previous prime is 71685643. The next prime is 71685683. The reversal of 71685672 is 27658617.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29479 + ... + 31817.

It is an arithmetic number, because the mean of its divisors is an integer number (5607225).

Almost surely, 2^71685672 is an apocalyptic number.

It is an amenable number.

71685672 is an abundant number, since it is smaller than the sum of its proper divisors (107745528).

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

71685672 is a wasteful number, since it uses less digits than its factorization.

71685672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3625 (or 3621 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 71685672 is about 8466.7391597946. The cubic root of 71685672 is about 415.4104846398.

The spelling of 71685672 in words is "seventy-one million, six hundred eighty-five thousand, six hundred seventy-two".