81752338 has 8 divisors (see below), whose sum is σ = 122713200. Its totient is φ = 40847940.

The previous prime is 81752309. The next prime is 81752339. The reversal of 81752338 is 83325718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 81752297 and 81752306.

It is not an unprimeable number, because it can be changed into a prime (81752339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10288 + ... + 16411.

It is an arithmetic number, because the mean of its divisors is an integer number (15339150).

Almost surely, 2^81752338 is an apocalyptic number.

81752338 is a deficient number, since it is larger than the sum of its proper divisors (40960862).

81752338 is a wasteful number, since it uses less digits than its factorization.

81752338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28232.

The product of its digits is 40320, while the sum is 37.

The square root of 81752338 is about 9041.6999507836. The cubic root of 81752338 is about 434.0103241755.

The spelling of 81752338 in words is "eighty-one million, seven hundred fifty-two thousand, three hundred thirty-eight".