71445744 has 60 divisors (see below), whose sum is σ = 201932016. Its totient is φ = 23579136.

The previous prime is 71445727. The next prime is 71445767. The reversal of 71445744 is 44754417.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 71445699 and 71445708.

It is a congruent number.

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, 12424 + ... + 17240.

Almost surely, 2^71445744 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 71445744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100966008).

71445744 is an abundant number, since it is smaller than the sum of its proper divisors (130486272).

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

71445744 is a wasteful number, since it uses less digits than its factorization.

71445744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934 (or 4925 counting only the distinct ones).

The product of its digits is 62720, while the sum is 36.

The square root of 71445744 is about 8452.5584292568. The cubic root of 71445744 is about 414.9465146148.

The spelling of 71445744 in words is "seventy-one million, four hundred forty-five thousand, seven hundred forty-four".