99839620 has 24 divisors (see below), whose sum is σ = 210299544. Its totient is φ = 39814656.

The previous prime is 99839603. The next prime is 99839627. The reversal of 99839620 is 2693899.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 956484 + 98883136 = 978^2 + 9944^2 .

It is not an unprimeable number, because it can be changed into a prime (99839627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667 + ... + 14146.

It is an arithmetic number, because the mean of its divisors is an integer number (8762481).

Almost surely, 2^99839620 is an apocalyptic number.

It is an amenable number.

99839620 is an abundant number, since it is smaller than the sum of its proper divisors (110459924).

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

99839620 is a wasteful number, since it uses less digits than its factorization.

99839620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15159 (or 15157 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 99839620 is about 9991.9777822011. The cubic root of 99839620 is about 463.9106112486.

The spelling of 99839620 in words is "ninety-nine million, eight hundred thirty-nine thousand, six hundred twenty".