71732736 has 80 divisors (see below), whose sum is σ = 212374800. Its totient is φ = 23906304.

The previous prime is 71732723. The next prime is 71732737. The reversal of 71732736 is 63723717.

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 71732736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71732737) 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, 11230 + ... + 16418.

It is an arithmetic number, because the mean of its divisors is an integer number (2654685).

Almost surely, 2^71732736 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 71732736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106187400).

71732736 is an abundant number, since it is smaller than the sum of its proper divisors (140642064).

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

71732736 is an equidigital number, since it uses as much as digits as its factorization.

71732736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5216 (or 5194 counting only the distinct ones).

The product of its digits is 37044, while the sum is 36.

The square root of 71732736 is about 8469.5180500428. The cubic root of 71732736 is about 415.5013749645.

The spelling of 71732736 in words is "seventy-one million, seven hundred thirty-two thousand, seven hundred thirty-six".