81160838 has 8 divisors (see below), whose sum is σ = 132808680. Its totient is φ = 36891280.

The previous prime is 81160829. The next prime is 81160841. The reversal of 81160838 is 83806118.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 81160798 and 81160807.

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 3 ways as a sum of consecutive naturals, for example, 1844543 + ... + 1844586.

It is an arithmetic number, because the mean of its divisors is an integer number (16601085).

Almost surely, 2^81160838 is an apocalyptic number.

81160838 is a deficient number, since it is larger than the sum of its proper divisors (51647842).

81160838 is a wasteful number, since it uses less digits than its factorization.

81160838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689142.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 81160838 is about 9008.9310131669. The cubic root of 81160838 is about 432.9610626590.

The spelling of 81160838 in words is "eighty-one million, one hundred sixty thousand, eight hundred thirty-eight".