71685385 has 8 divisors (see below), whose sum is σ = 90550080. Its totient is φ = 54329904.

The previous prime is 71685371. The next prime is 71685407. The reversal of 71685385 is 58358617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71685385 - 2¹⁷ = 71554313 is a prime.

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, 377197 + ... + 377386.

It is an arithmetic number, because the mean of its divisors is an integer number (11318760).

Almost surely, 2^71685385 is an apocalyptic number.

It is an amenable number.

71685385 is a deficient number, since it is larger than the sum of its proper divisors (18864695).

71685385 is a wasteful number, since it uses less digits than its factorization.

71685385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754607.

The product of its digits is 201600, while the sum is 43.

The square root of 71685385 is about 8466.7222111039. The cubic root of 71685385 is about 415.4099302614.

The spelling of 71685385 in words is "seventy-one million, six hundred eighty-five thousand, three hundred eighty-five".