81834824 has 32 divisors (see below), whose sum is σ = 165892800. Its totient is φ = 37713600.

The previous prime is 81834803. The next prime is 81834847. The reversal of 81834824 is 42843818.

It is a super-2 number, since 2×81834824² = 13393876838221952, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1652 + ... + 12899.

It is an arithmetic number, because the mean of its divisors is an integer number (5184150).

Almost surely, 2^81834824 is an apocalyptic number.

It is an amenable number.

81834824 is an abundant number, since it is smaller than the sum of its proper divisors (84057976).

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

81834824 is a wasteful number, since it uses less digits than its factorization.

81834824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14613 (or 14609 counting only the distinct ones).

The product of its digits is 49152, while the sum is 38.

The square root of 81834824 is about 9046.2602217712. The cubic root of 81834824 is about 434.1562435171.

The spelling of 81834824 in words is "eighty-one million, eight hundred thirty-four thousand, eight hundred twenty-four".