81834484 has 12 divisors (see below), whose sum is σ = 144256644. Its totient is φ = 40618304.

The previous prime is 81834469. The next prime is 81834499. The reversal of 81834484 is 48443818.

It is an interprime number because it is at equal distance from previous prime (81834469) and next prime (81834499).

It can be written as a sum of positive squares in 2 ways, for example, as 37478884 + 44355600 = 6122^2 + 6660^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 74119 + ... + 75214.

It is an arithmetic number, because the mean of its divisors is an integer number (12021387).

Almost surely, 2^81834484 is an apocalyptic number.

It is an amenable number.

81834484 is a deficient number, since it is larger than the sum of its proper divisors (62422160).

81834484 is a wasteful number, since it uses less digits than its factorization.

81834484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149474 (or 149472 counting only the distinct ones).

The product of its digits is 98304, while the sum is 40.

The square root of 81834484 is about 9046.2414294557. The cubic root of 81834484 is about 434.1556422518.

The spelling of 81834484 in words is "eighty-one million, eight hundred thirty-four thousand, four hundred eighty-four".