81838348 has 24 divisors (see below), whose sum is σ = 149839200. Its totient is φ = 39059328.

The previous prime is 81838333. The next prime is 81838349. The reversal of 81838348 is 84383818.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81838349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6361 + ... + 14287.

It is an arithmetic number, because the mean of its divisors is an integer number (6243300).

Almost surely, 2^81838348 is an apocalyptic number.

It is an amenable number.

81838348 is a deficient number, since it is larger than the sum of its proper divisors (68000852).

81838348 is a wasteful number, since it uses less digits than its factorization.

81838348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8049 (or 8047 counting only the distinct ones).

The product of its digits is 147456, while the sum is 43.

The square root of 81838348 is about 9046.4549962955. The cubic root of 81838348 is about 434.1624753573.

The spelling of 81838348 in words is "eighty-one million, eight hundred thirty-eight thousand, three hundred forty-eight".