71787696 has 80 divisors (see below), whose sum is σ = 193154304. Its totient is φ = 22954752.

The previous prime is 71787671. The next prime is 71787697. The reversal of 71787696 is 69678717.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71787697) 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 15 ways as a sum of consecutive naturals, for example, 147165 + ... + 147651.

Almost surely, 2^71787696 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 71787696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96577152).

71787696 is an abundant number, since it is smaller than the sum of its proper divisors (121366608).

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

71787696 is a wasteful number, since it uses less digits than its factorization.

71787696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 612 counting only the distinct ones).

The product of its digits is 889056, while the sum is 51.

The square root of 71787696 is about 8472.7620053912. The cubic root of 71787696 is about 415.6074637936.

The spelling of 71787696 in words is "seventy-one million, seven hundred eighty-seven thousand, six hundred ninety-six".