81802300 has 36 divisors (see below), whose sum is σ = 187956720. Its totient is φ = 30795520.

The previous prime is 81802271. The next prime is 81802307. The reversal of 81802300 is 320818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81802307) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 22360 + ... + 25759.

It is an arithmetic number, because the mean of its divisors is an integer number (5221020).

Almost surely, 2^81802300 is an apocalyptic number.

It is an amenable number.

81802300 is an abundant number, since it is smaller than the sum of its proper divisors (106154420).

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

81802300 is a wasteful number, since it uses less digits than its factorization.

81802300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48150 (or 48143 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 81802300 is about 9044.4623941946. The cubic root of 81802300 is about 434.0987196414.

The spelling of 81802300 in words is "eighty-one million, eight hundred two thousand, three hundred".