71386536 has 128 divisors (see below), whose sum is σ = 208897920. Its totient is φ = 20127744.

The previous prime is 71386529. The next prime is 71386543. The reversal of 71386536 is 63568317.

71386536 is nontrivially palindromic in base 5.

It is an interprime number because it is at equal distance from previous prime (71386529) and next prime (71386543).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 71386494 and 71386503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227916 + ... + 228228.

It is an arithmetic number, because the mean of its divisors is an integer number (1632015).

Almost surely, 2^71386536 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 71386536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104448960).

71386536 is an abundant number, since it is smaller than the sum of its proper divisors (137511384).

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

71386536 is a wasteful number, since it uses less digits than its factorization.

71386536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 391 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 71386536 is about 8449.0553318108. The cubic root of 71386536 is about 414.8318591124.

The spelling of 71386536 in words is "seventy-one million, three hundred eighty-six thousand, five hundred thirty-six".