71320056 has 64 divisors (see below), whose sum is σ = 190080000. Its totient is φ = 22247808.

The previous prime is 71320043. The next prime is 71320087. The reversal of 71320056 is 65002317.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24570 + ... + 27318.

It is an arithmetic number, because the mean of its divisors is an integer number (2970000).

Almost surely, 2^71320056 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 71320056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95040000).

71320056 is an abundant number, since it is smaller than the sum of its proper divisors (118759944).

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

71320056 is a wasteful number, since it uses less digits than its factorization.

71320056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828 (or 2824 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 71320056 is about 8445.1202478118. The cubic root of 71320056 is about 414.7030458991.

The spelling of 71320056 in words is "seventy-one million, three hundred twenty thousand, fifty-six".