81708300 has 54 divisors (see below), whose sum is σ = 256112948. Its totient is φ = 21788640.

The previous prime is 81708269. The next prime is 81708301. The reversal of 81708300 is 380718.

It is not an unprimeable number, because it can be changed into a prime (81708301) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 44494 + ... + 46293.

Almost surely, 2^81708300 is an apocalyptic number.

It is an amenable number.

81708300 is an abundant number, since it is smaller than the sum of its proper divisors (174404648).

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

81708300 is a wasteful number, since it uses less digits than its factorization.

81708300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90807 (or 90797 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 81708300 is about 9039.2643505984. The cubic root of 81708300 is about 433.9323799028.

The spelling of 81708300 in words is "eighty-one million, seven hundred eight thousand, three hundred".