81276376 has 32 divisors (see below), whose sum is σ = 161280000. Its totient is φ = 38291616.

The previous prime is 81276361. The next prime is 81276413. The reversal of 81276376 is 67367218.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 28905 + ... + 31591.

It is an arithmetic number, because the mean of its divisors is an integer number (5040000).

Almost surely, 2^81276376 is an apocalyptic number.

It is an amenable number.

81276376 is a deficient number, since it is larger than the sum of its proper divisors (80003624).

81276376 is a wasteful number, since it uses less digits than its factorization.

81276376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911 (or 2907 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 81276376 is about 9015.3411471780. The cubic root of 81276376 is about 433.1664151335.

The spelling of 81276376 in words is "eighty-one million, two hundred seventy-six thousand, three hundred seventy-six".