71313940 has 12 divisors (see below), whose sum is σ = 149759316. Its totient is φ = 28525568.

The previous prime is 71313923. The next prime is 71313971. The reversal of 71313940 is 4931317.

It can be written as a sum of positive squares in 2 ways, for example, as 12362256 + 58951684 = 3516^2 + 7678^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71313899 and 71313908.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1782829 + ... + 1782868.

It is an arithmetic number, because the mean of its divisors is an integer number (12479943).

Almost surely, 2^71313940 is an apocalyptic number.

It is an amenable number.

71313940 is an abundant number, since it is smaller than the sum of its proper divisors (78445376).

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

71313940 is a wasteful number, since it uses less digits than its factorization.

71313940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3565706 (or 3565704 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 71313940 is about 8444.7581374483. The cubic root of 71313940 is about 414.6911913733.

The spelling of 71313940 in words is "seventy-one million, three hundred thirteen thousand, nine hundred forty".