71687052 has 48 divisors (see below), whose sum is σ = 188648320. Its totient is φ = 23536656.

The previous prime is 71687027. The next prime is 71687053. The reversal of 71687052 is 25078617.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 71686998 and 71687016.

It is not an unprimeable number, because it can be changed into a prime (71687053) 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 15 ways as a sum of consecutive naturals, for example, 2283 + ... + 12189.

Almost surely, 2^71687052 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 71687052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94324160).

71687052 is an abundant number, since it is smaller than the sum of its proper divisors (116961268).

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

71687052 is a wasteful number, since it uses less digits than its factorization.

71687052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987 (or 9979 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 71687052 is about 8466.8206547676. The cubic root of 71687052 is about 415.4131502715.

The spelling of 71687052 in words is "seventy-one million, six hundred eighty-seven thousand, fifty-two".