81838060 has 24 divisors (see below), whose sum is σ = 172042416. Its totient is φ = 32700480.

The previous prime is 81838049. The next prime is 81838061. The reversal of 81838060 is 6083818.

It is not an unprimeable number, because it can be changed into a prime (81838061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26139 + ... + 29101.

It is an arithmetic number, because the mean of its divisors is an integer number (7168434).

Almost surely, 2^81838060 is an apocalyptic number.

It is an amenable number.

81838060 is an abundant number, since it is smaller than the sum of its proper divisors (90204356).

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

81838060 is a wasteful number, since it uses less digits than its factorization.

81838060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4353 (or 4351 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 81838060 is about 9046.4390784441. The cubic root of 81838060 is about 434.1619660649.

The spelling of 81838060 in words is "eighty-one million, eight hundred thirty-eight thousand, sixty".