71047840 has 48 divisors (see below), whose sum is σ = 176692320. Its totient is φ = 26922240.

The previous prime is 71047831. The next prime is 71047841. The reversal of 71047840 is 4874017.

It is not an unprimeable number, because it can be changed into a prime (71047841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8646 + ... + 14725.

It is an arithmetic number, because the mean of its divisors is an integer number (3681090).

Almost surely, 2^71047840 is an apocalyptic number.

It is an amenable number.

71047840 is an abundant number, since it is smaller than the sum of its proper divisors (105644480).

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

71047840 is a wasteful number, since it uses less digits than its factorization.

71047840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23405 (or 23397 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 71047840 is about 8428.9880768690. The cubic root of 71047840 is about 414.1747572170.

The spelling of 71047840 in words is "seventy-one million, forty-seven thousand, eight hundred forty".