71939448 has 128 divisors (see below), whose sum is σ = 233280000. Its totient is φ = 20532960.

The previous prime is 71939443. The next prime is 71939471. The reversal of 71939448 is 84493917.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71939443) 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 31 ways as a sum of consecutive naturals, for example, 73603 + ... + 74573.

It is an arithmetic number, because the mean of its divisors is an integer number (1822500).

Almost surely, 2^71939448 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 71939448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116640000).

71939448 is an abundant number, since it is smaller than the sum of its proper divisors (161340552).

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

71939448 is a wasteful number, since it uses less digits than its factorization.

71939448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007 (or 983 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 71939448 is about 8481.7125629203. The cubic root of 71939448 is about 415.9001085353.

It can be divided in two parts, 7193 and 9448, that added together give a square (16641 = 129²).

The spelling of 71939448 in words is "seventy-one million, nine hundred thirty-nine thousand, four hundred forty-eight".