71286272 has 80 divisors (see below), whose sum is σ = 151142112. Its totient is φ = 33546240.

The previous prime is 71286239. The next prime is 71286277. The reversal of 71286272 is 27268217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71286277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1003997 + ... + 1004067.

Almost surely, 2^71286272 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 71286272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75571056).

71286272 is an abundant number, since it is smaller than the sum of its proper divisors (79855840).

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

71286272 is an equidigital number, since it uses as much as digits as its factorization.

71286272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 163 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 71286272 is about 8443.1198025374. The cubic root of 71286272 is about 414.6375545480.

The spelling of 71286272 in words is "seventy-one million, two hundred eighty-six thousand, two hundred seventy-two".