71247488 has 64 divisors (see below), whose sum is σ = 156280320. Its totient is φ = 32148480.

The previous prime is 71247481. The next prime is 71247497. The reversal of 71247488 is 88474217.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (71247481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77753 + ... + 78663.

It is an arithmetic number, because the mean of its divisors is an integer number (2441880).

Almost surely, 2^71247488 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 71247488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78140160).

71247488 is an abundant number, since it is smaller than the sum of its proper divisors (85032832).

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

71247488 is a wasteful number, since it uses less digits than its factorization.

71247488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985 (or 973 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 71247488 is about 8440.8227087174. The cubic root of 71247488 is about 414.5623450219.

The spelling of 71247488 in words is "seventy-one million, two hundred forty-seven thousand, four hundred eighty-eight".