81268376 has 32 divisors (see below), whose sum is σ = 174493440. Its totient is φ = 34759968.

The previous prime is 81268373. The next prime is 81268403. The reversal of 81268376 is 67386218.

It is a happy number.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81268373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35111 + ... + 37353.

It is an arithmetic number, because the mean of its divisors is an integer number (5452920).

Almost surely, 2^81268376 is an apocalyptic number.

It is an amenable number.

81268376 is an abundant number, since it is smaller than the sum of its proper divisors (93225064).

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

81268376 is a wasteful number, since it uses less digits than its factorization.

81268376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903 (or 2899 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 81268376 is about 9014.8974481133. The cubic root of 81268376 is about 433.1522025369.

The spelling of 81268376 in words is "eighty-one million, two hundred sixty-eight thousand, three hundred seventy-six".