71969436 has 108 divisors (see below), whose sum is σ = 230925240. Its totient is φ = 18688320.

The previous prime is 71969431. The next prime is 71969437. The reversal of 71969436 is 63496917.

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

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

It is a junction number, because it is equal to n+sod(n) for n = 71969391 and 71969400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71969431) 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 35 ways as a sum of consecutive naturals, for example, 17550 + ... + 21258.

Almost surely, 2^71969436 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 71969436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115462620).

71969436 is an abundant number, since it is smaller than the sum of its proper divisors (158955804).

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

71969436 is a wasteful number, since it uses less digits than its factorization.

71969436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744 (or 3732 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 71969436 is about 8483.4801820951. The cubic root of 71969436 is about 415.9578899066.

The spelling of 71969436 in words is "seventy-one million, nine hundred sixty-nine thousand, four hundred thirty-six".