81410380 has 12 divisors (see below), whose sum is σ = 170961840. Its totient is φ = 32564144.

The previous prime is 81410333. The next prime is 81410393. The reversal of 81410380 is 8301418.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2035240 + ... + 2035279.

It is an arithmetic number, because the mean of its divisors is an integer number (14246820).

Almost surely, 2^81410380 is an apocalyptic number.

It is an amenable number.

81410380 is an abundant number, since it is smaller than the sum of its proper divisors (89551460).

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

81410380 is a wasteful number, since it uses less digits than its factorization.

81410380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070528 (or 4070526 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 81410380 is about 9022.7700846248. The cubic root of 81410380 is about 433.4043447071.

Adding to 81410380 its reverse (8301418), we get a palindrome (89711798).

The spelling of 81410380 in words is "eighty-one million, four hundred ten thousand, three hundred eighty".