71444736 has 108 divisors (see below), whose sum is σ = 224799120. Its totient is φ = 21642240.

The previous prime is 71444707. The next prime is 71444741. The reversal of 71444736 is 63744417.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 71444736.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23935 + ... + 26753.

Almost surely, 2^71444736 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 71444736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112399560).

71444736 is an abundant number, since it is smaller than the sum of its proper divisors (153354384).

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

71444736 is a wasteful number, since it uses less digits than its factorization.

71444736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852 (or 2835 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 71444736 is about 8452.4988021295. The cubic root of 71444736 is about 414.9445631664.

The spelling of 71444736 in words is "seventy-one million, four hundred forty-four thousand, seven hundred thirty-six".