71686072 has 16 divisors (see below), whose sum is σ = 135394560. Its totient is φ = 35580864.

The previous prime is 71686067. The next prime is 71686103. The reversal of 71686072 is 27068617.

It is a happy number.

It is a congruent number.

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, 31608 + ... + 33799.

It is an arithmetic number, because the mean of its divisors is an integer number (8462160).

Almost surely, 2^71686072 is an apocalyptic number.

It is an amenable number.

71686072 is a deficient number, since it is larger than the sum of its proper divisors (63708488).

71686072 is a wasteful number, since it uses less digits than its factorization.

71686072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65550 (or 65546 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 71686072 is about 8466.7627816067. The cubic root of 71686072 is about 415.4112572902.

The spelling of 71686072 in words is "seventy-one million, six hundred eighty-six thousand, seventy-two".