71136320 has 112 divisors (see below), whose sum is σ = 179076096. Its totient is φ = 26880000.

The previous prime is 71136301. The next prime is 71136341. The reversal of 71136320 is 2363117.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 704270 + ... + 704370.

Almost surely, 2^71136320 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 71136320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89538048).

71136320 is an abundant number, since it is smaller than the sum of its proper divisors (107939776).

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

71136320 is a wasteful number, since it uses less digits than its factorization.

71136320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 71136320 is about 8434.2349979118. The cubic root of 71136320 is about 414.3466178510.

Adding to 71136320 its reverse (2363117), we get a palindrome (73499437).

The spelling of 71136320 in words is "seventy-one million, one hundred thirty-six thousand, three hundred twenty".