99959850 has 72 divisors (see below), whose sum is σ = 270196992. Its totient is φ = 26493600.

The previous prime is 99959833. The next prime is 99959891. The reversal of 99959850 is 5895999.

It is a super-2 number, since 2×99959850² = 19983943224045000, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 85369 + ... + 86531.

It is an arithmetic number, because the mean of its divisors is an integer number (3752736).

Almost surely, 2^99959850 is an apocalyptic number.

99959850 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 99959850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135098496).

99959850 is an abundant number, since it is smaller than the sum of its proper divisors (170237142).

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

99959850 is a wasteful number, since it uses less digits than its factorization.

99959850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372 (or 1364 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 54.

The square root of 99959850 is about 9997.9922984567. The cubic root of 99959850 is about 464.0967551151.

The spelling of 99959850 in words is "ninety-nine million, nine hundred fifty-nine thousand, eight hundred fifty".