71747444 has 12 divisors (see below), whose sum is σ = 125655684. Its totient is φ = 35845824.

The previous prime is 71747413. The next prime is 71747447. The reversal of 71747444 is 44474717.

It can be written as a sum of positive squares in 2 ways, for example, as 63840100 + 7907344 = 7990^2 + 2812^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71747398 and 71747407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71747447) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 527 + ... + 11990.

It is an arithmetic number, because the mean of its divisors is an integer number (10471307).

Almost surely, 2^71747444 is an apocalyptic number.

It is an amenable number.

71747444 is a deficient number, since it is larger than the sum of its proper divisors (53908240).

71747444 is a wasteful number, since it uses less digits than its factorization.

71747444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13954 (or 13952 counting only the distinct ones).

The product of its digits is 87808, while the sum is 38.

The square root of 71747444 is about 8470.3862957955. The cubic root of 71747444 is about 415.5297710030.

The spelling of 71747444 in words is "seventy-one million, seven hundred forty-seven thousand, four hundred forty-four".