81334808 has 24 divisors (see below), whose sum is σ = 159429900. Its totient is φ = 38897232.

The previous prime is 81334789. The next prime is 81334829. The reversal of 81334808 is 80843318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5378 + ... + 13841.

Almost surely, 2^81334808 is an apocalyptic number.

It is an amenable number.

81334808 is a deficient number, since it is larger than the sum of its proper divisors (78095092).

81334808 is a wasteful number, since it uses less digits than its factorization.

81334808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19271 (or 19244 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 81334808 is about 9018.5812631478. The cubic root of 81334808 is about 433.2701956664.

The spelling of 81334808 in words is "eighty-one million, three hundred thirty-four thousand, eight hundred eight".