81714388 has 48 divisors (see below), whose sum is σ = 172376064. Its totient is φ = 33153120.

The previous prime is 81714337. The next prime is 81714403. The reversal of 81714388 is 88341718.

It is a self number, because there is not a number n which added to its sum of digits gives 81714388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39795 + ... + 41797.

It is an arithmetic number, because the mean of its divisors is an integer number (3591168).

Almost surely, 2^81714388 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 81714388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86188032).

81714388 is an abundant number, since it is smaller than the sum of its proper divisors (90661676).

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

81714388 is a wasteful number, since it uses less digits than its factorization.

81714388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092 (or 2090 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 81714388 is about 9039.6010973936. The cubic root of 81714388 is about 433.9431569178.

The spelling of 81714388 in words is "eighty-one million, seven hundred fourteen thousand, three hundred eighty-eight".