71944470 has 128 divisors (see below), whose sum is σ = 209664000. Its totient is φ = 17449344.

The previous prime is 71944441. The next prime is 71944471. The reversal of 71944470 is 7444917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71944471) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 361431 + ... + 361629.

It is an arithmetic number, because the mean of its divisors is an integer number (1638000).

Almost surely, 2^71944470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71944470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104832000).

71944470 is an abundant number, since it is smaller than the sum of its proper divisors (137719530).

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

71944470 is a wasteful number, since it uses less digits than its factorization.

71944470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 71944470 is about 8482.0086064564. The cubic root of 71944470 is about 415.9097861267.

It can be divided in two parts, 7194 and 4470, that added together give a square (11664 = 108²).

The spelling of 71944470 in words is "seventy-one million, nine hundred forty-four thousand, four hundred seventy".