71318840 has 16 divisors (see below), whose sum is σ = 160467480. Its totient is φ = 28527520.

The previous prime is 71318833. The next prime is 71318873. The reversal of 71318840 is 4881317.

It is a junction number, because it is equal to n+sod(n) for n = 71318797 and 71318806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891446 + ... + 891525.

Almost surely, 2^71318840 is an apocalyptic number.

It is an amenable number.

71318840 is an abundant number, since it is smaller than the sum of its proper divisors (89148640).

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

71318840 is a wasteful number, since it uses less digits than its factorization.

71318840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782982 (or 1782978 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 71318840 is about 8445.0482532665. The cubic root of 71318840 is about 414.7006890035.

The spelling of 71318840 in words is "seventy-one million, three hundred eighteen thousand, eight hundred forty".