71386532 has 30 divisors (see below), whose sum is σ = 145758438. Its totient is φ = 30590112.

The previous prime is 71386529. The next prime is 71386543. The reversal of 71386532 is 23568317.

It can be written as a sum of positive squares in only one way, i.e., 44408896 + 26977636 = 6664^2 + 5194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71386492 and 71386501.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5888 + ... + 13320.

Almost surely, 2^71386532 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 71386532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72879219).

71386532 is an abundant number, since it is smaller than the sum of its proper divisors (74371906).

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

71386532 is an equidigital number, since it uses as much as digits as its factorization.

71386532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7465 (or 7442 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 71386532 is about 8449.0550950979. The cubic root of 71386532 is about 414.8318513643.

The spelling of 71386532 in words is "seventy-one million, three hundred eighty-six thousand, five hundred thirty-two".