71432736 has 48 divisors (see below), whose sum is σ = 188592768. Its totient is φ = 23673600.

The previous prime is 71432717. The next prime is 71432741. The reversal of 71432736 is 63723417.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 71432697 and 71432706.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15321 + ... + 19431.

It is an arithmetic number, because the mean of its divisors is an integer number (3929016).

Almost surely, 2^71432736 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 71432736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94296384).

71432736 is an abundant number, since it is smaller than the sum of its proper divisors (117160032).

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

71432736 is a wasteful number, since it uses less digits than its factorization.

71432736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4305 (or 4297 counting only the distinct ones).

The product of its digits is 21168, while the sum is 33.

The square root of 71432736 is about 8451.7889230624. The cubic root of 71432736 is about 414.9213302274.

The spelling of 71432736 in words is "seventy-one million, four hundred thirty-two thousand, seven hundred thirty-six".