81926038 has 4 divisors (see below), whose sum is σ = 122889060. Its totient is φ = 40963018.

The previous prime is 81926003. The next prime is 81926041. The reversal of 81926038 is 83062918.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 81925988 and 81926006.

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 as a sum of consecutive naturals, namely, 20481508 + ... + 20481511.

It is an arithmetic number, because the mean of its divisors is an integer number (30722265).

Almost surely, 2^81926038 is an apocalyptic number.

81926038 is a deficient number, since it is larger than the sum of its proper divisors (40963022).

81926038 is a wasteful number, since it uses less digits than its factorization.

81926038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40963021.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 81926038 is about 9051.3003485687. The cubic root of 81926038 is about 434.3174887404.

The spelling of 81926038 in words is "eighty-one million, nine hundred twenty-six thousand, thirty-eight".