99581382 has 24 divisors (see below), whose sum is σ = 219832704. Its totient is φ = 32567184.

The previous prime is 99581371. The next prime is 99581387. The reversal of 99581382 is 28318599.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99581387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51238 + ... + 53145.

It is an arithmetic number, because the mean of its divisors is an integer number (9159696).

Almost surely, 2^99581382 is an apocalyptic number.

99581382 is an abundant number, since it is smaller than the sum of its proper divisors (120251322).

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

99581382 is a wasteful number, since it uses less digits than its factorization.

99581382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104444 (or 104441 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 99581382 is about 9979.0471489015. The cubic root of 99581382 is about 463.5102932678.

The spelling of 99581382 in words is "ninety-nine million, five hundred eighty-one thousand, three hundred eighty-two".