71447936 has 64 divisors (see below), whose sum is σ = 169793280. Its totient is φ = 29280768.

The previous prime is 71447933. The next prime is 71447989. The reversal of 71447936 is 63974417.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 71447893 and 71447902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71447933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18875 + ... + 22341.

It is an arithmetic number, because the mean of its divisors is an integer number (2653020).

Almost surely, 2^71447936 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 71447936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84896640).

71447936 is an abundant number, since it is smaller than the sum of its proper divisors (98345344).

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

71447936 is a wasteful number, since it uses less digits than its factorization.

71447936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511 (or 3499 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 71447936 is about 8452.6880931453. The cubic root of 71447936 is about 414.9507581774.

The spelling of 71447936 in words is "seventy-one million, four hundred forty-seven thousand, nine hundred thirty-six".