71685318 has 16 divisors (see below), whose sum is σ = 144201456. Its totient is φ = 23756640.

The previous prime is 71685307. The next prime is 71685331. The reversal of 71685318 is 81358617.

It is a super-2 number, since 2×71685318² = 10277569633522248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33493 + ... + 35568.

It is an arithmetic number, because the mean of its divisors is an integer number (9012591).

Almost surely, 2^71685318 is an apocalyptic number.

71685318 is an abundant number, since it is smaller than the sum of its proper divisors (72516138).

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

71685318 is a wasteful number, since it uses less digits than its factorization.

71685318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69239.

The product of its digits is 40320, while the sum is 39.

The square root of 71685318 is about 8466.7182544360. The cubic root of 71685318 is about 415.4098008418.

The spelling of 71685318 in words is "seventy-one million, six hundred eighty-five thousand, three hundred eighteen".