71138608 has 40 divisors (see below), whose sum is σ = 149521680. Its totient is φ = 32655360.

The previous prime is 71138581. The next prime is 71138623. The reversal of 71138608 is 80683117.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 7963 + ... + 14341.

It is an arithmetic number, because the mean of its divisors is an integer number (3738042).

Almost surely, 2^71138608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71138608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74760840).

71138608 is an abundant number, since it is smaller than the sum of its proper divisors (78383072).

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

71138608 is a wasteful number, since it uses less digits than its factorization.

71138608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6445 (or 6439 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 71138608 is about 8434.3706344931. The cubic root of 71138608 is about 414.3510600961.

The spelling of 71138608 in words is "seventy-one million, one hundred thirty-eight thousand, six hundred eight".