71939268 has 36 divisors (see below), whose sum is σ = 182111020. Its totient is φ = 23944896.

The previous prime is 71939267. The next prime is 71939293. The reversal of 71939268 is 86293917.

It can be written as a sum of positive squares in 2 ways, for example, as 35070084 + 36869184 = 5922^2 + 6072^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

Its product of digits (163296) is a multiple of the sum of its prime factors (2916).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71939261) 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 11 ways as a sum of consecutive naturals, for example, 39318 + ... + 41106.

Almost surely, 2^71939268 is an apocalyptic number.

It is an amenable number.

71939268 is an abundant number, since it is smaller than the sum of its proper divisors (110171752).

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

71939268 is a wasteful number, since it uses less digits than its factorization.

71939268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916 (or 2911 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 71939268 is about 8481.7019518491. The cubic root of 71939268 is about 415.8997616599.

It can be divided in two parts, 7193 and 9268, that added together give a palindrome (16461).

The spelling of 71939268 in words is "seventy-one million, nine hundred thirty-nine thousand, two hundred sixty-eight".