81076408 has 32 divisors (see below), whose sum is σ = 179343360. Its totient is φ = 33625440.

The previous prime is 81076367. The next prime is 81076409. The reversal of 81076408 is 80467018.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81076409) 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, 21616 + ... + 25087.

It is an arithmetic number, because the mean of its divisors is an integer number (5604480).

Almost surely, 2^81076408 is an apocalyptic number.

It is an amenable number.

81076408 is an abundant number, since it is smaller than the sum of its proper divisors (98266952).

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

81076408 is a wasteful number, since it uses less digits than its factorization.

81076408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46747 (or 46743 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 81076408 is about 9004.2438883007. The cubic root of 81076408 is about 432.8108769844.

The spelling of 81076408 in words is "eighty-one million, seventy-six thousand, four hundred eight".