81830264 has 16 divisors (see below), whose sum is σ = 161507400. Its totient is φ = 38761632.

The previous prime is 81830233. The next prime is 81830311. The reversal of 81830264 is 46203818.

It is a self number, because there is not a number n which added to its sum of digits gives 81830264.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 269027 + ... + 269330.

Almost surely, 2^81830264 is an apocalyptic number.

It is an amenable number.

81830264 is a deficient number, since it is larger than the sum of its proper divisors (79677136).

81830264 is a wasteful number, since it uses less digits than its factorization.

81830264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538382 (or 538378 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 81830264 is about 9046.0081804075. The cubic root of 81830264 is about 434.1481793493.

The spelling of 81830264 in words is "eighty-one million, eight hundred thirty thousand, two hundred sixty-four".