71912568 has 128 divisors (see below), whose sum is σ = 233049600. Its totient is φ = 17957376.

The previous prime is 71912557. The next prime is 71912569. The reversal of 71912568 is 86521917.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71912569) 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 31 ways as a sum of consecutive naturals, for example, 40630 + ... + 42362.

It is an arithmetic number, because the mean of its divisors is an integer number (1820700).

Almost surely, 2^71912568 is an apocalyptic number.

71912568 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71912568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116524800).

71912568 is an abundant number, since it is smaller than the sum of its proper divisors (161137032).

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

71912568 is a wasteful number, since it uses less digits than its factorization.

71912568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1777 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 71912568 is about 8480.1278292252. The cubic root of 71912568 is about 415.8483020606.

The spelling of 71912568 in words is "seventy-one million, nine hundred twelve thousand, five hundred sixty-eight".