71047400 has 48 divisors (see below), whose sum is σ = 169667340. Its totient is φ = 27648000.

The previous prime is 71047331. The next prime is 71047411. The reversal of 71047400 is 474017.

It can be written as a sum of positive squares in 6 ways, for example, as 51351556 + 19695844 = 7166^2 + 4438^2 .

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 11 ways as a sum of consecutive naturals, for example, 2600 + ... + 12200.

Almost surely, 2^71047400 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 71047400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84833670).

71047400 is an abundant number, since it is smaller than the sum of its proper divisors (98619940).

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

71047400 is a wasteful number, since it uses less digits than its factorization.

71047400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9654 (or 9645 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 71047400 is about 8428.9619764239. The cubic root of 71047400 is about 414.1739022190.

The spelling of 71047400 in words is "seventy-one million, forty-seven thousand, four hundred".