81079838 has 8 divisors (see below), whose sum is σ = 138994032. Its totient is φ = 34748496.

The previous prime is 81079753. The next prime is 81079861. The reversal of 81079838 is 83897018.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2895695 + ... + 2895722.

It is an arithmetic number, because the mean of its divisors is an integer number (17374254).

Almost surely, 2^81079838 is an apocalyptic number.

81079838 is a deficient number, since it is larger than the sum of its proper divisors (57914194).

81079838 is a wasteful number, since it uses less digits than its factorization.

81079838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5791426.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 81079838 is about 9004.4343520290. The cubic root of 81079838 is about 432.8169803643.

The spelling of 81079838 in words is "eighty-one million, seventy-nine thousand, eight hundred thirty-eight".