71800056 has 96 divisors (see below), whose sum is σ = 203439600. Its totient is φ = 22848000.

The previous prime is 71800021. The next prime is 71800073. The reversal of 71800056 is 65000817.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285931 + ... + 286181.

Almost surely, 2^71800056 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 71800056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101719800).

71800056 is an abundant number, since it is smaller than the sum of its proper divisors (131639544).

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

71800056 is a wasteful number, since it uses less digits than its factorization.

71800056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 71800056 is about 8473.4913701496. The cubic root of 71800056 is about 415.6313147400.

The spelling of 71800056 in words is "seventy-one million, eight hundred thousand, fifty-six".