71039670 has 64 divisors (see below), whose sum is σ = 193294080. Its totient is φ = 16564608.

The previous prime is 71039659. The next prime is 71039671. The reversal of 71039670 is 7693017.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71039671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2617 + ... + 12203.

It is an arithmetic number, because the mean of its divisors is an integer number (3020220).

Almost surely, 2^71039670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71039670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96647040).

71039670 is an abundant number, since it is smaller than the sum of its proper divisors (122254410).

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

71039670 is a wasteful number, since it uses less digits than its factorization.

71039670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9629.

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 71039670 is about 8428.5034258758. The cubic root of 71039670 is about 414.1588808841.

The spelling of 71039670 in words is "seventy-one million, thirty-nine thousand, six hundred seventy".