71729536 has 32 divisors (see below), whose sum is σ = 147516480. Its totient is φ = 34705920.

The previous prime is 71729533. The next prime is 71729573. The reversal of 71729536 is 63592717.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71729531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5071 + ... + 13006.

It is an arithmetic number, because the mean of its divisors is an integer number (4609890).

Almost surely, 2^71729536 is an apocalyptic number.

It is an amenable number.

71729536 is an abundant number, since it is smaller than the sum of its proper divisors (75786944).

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

71729536 is a wasteful number, since it uses less digits than its factorization.

71729536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18122 (or 18110 counting only the distinct ones).

The product of its digits is 79380, while the sum is 40.

The square root of 71729536 is about 8469.3291351795. The cubic root of 71729536 is about 415.4951963621.

The spelling of 71729536 in words is "seventy-one million, seven hundred twenty-nine thousand, five hundred thirty-six".