71313040 has 40 divisors (see below), whose sum is σ = 167132160. Its totient is φ = 28296576.

The previous prime is 71313017. The next prime is 71313083. The reversal of 71313040 is 4031317.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 71312999 and 71313017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6651 + ... + 13669.

It is an arithmetic number, because the mean of its divisors is an integer number (4178304).

Almost surely, 2^71313040 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 71313040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83566080).

71313040 is an abundant number, since it is smaller than the sum of its proper divisors (95819120).

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

71313040 is a wasteful number, since it uses less digits than its factorization.

71313040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7159 (or 7153 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 71313040 is about 8444.7048497860. The cubic root of 71313040 is about 414.6894468633.

Adding to 71313040 its reverse (4031317), we get a palindrome (75344357).

The spelling of 71313040 in words is "seventy-one million, three hundred thirteen thousand, forty".