81838926 has 36 divisors (see below), whose sum is σ = 192013848. Its totient is φ = 25180272.

The previous prime is 81838921. The next prime is 81838937. The reversal of 81838926 is 62983818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81838921) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10410 + ... + 16493.

It is an arithmetic number, because the mean of its divisors is an integer number (5333718).

Almost surely, 2^81838926 is an apocalyptic number.

81838926 is an abundant number, since it is smaller than the sum of its proper divisors (110174922).

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

81838926 is a wasteful number, since it uses less digits than its factorization.

81838926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26937 (or 26921 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 81838926 is about 9046.4869424545. The cubic root of 81838926 is about 434.1634974752.

The spelling of 81838926 in words is "eighty-one million, eight hundred thirty-eight thousand, nine hundred twenty-six".