99870030 has 128 divisors (see below), whose sum is σ = 294940800. Its totient is φ = 23887872.

The previous prime is 99870011. The next prime is 99870031. The reversal of 99870030 is 3007899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99870031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 129486 + ... + 130254.

It is an arithmetic number, because the mean of its divisors is an integer number (2304225).

Almost surely, 2^99870030 is an apocalyptic number.

99870030 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 99870030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147470400).

99870030 is an abundant number, since it is smaller than the sum of its proper divisors (195070770).

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

99870030 is a wasteful number, since it uses less digits than its factorization.

99870030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835 (or 829 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 99870030 is about 9993.4993871016. The cubic root of 99870030 is about 463.9577070796.

The spelling of 99870030 in words is "ninety-nine million, eight hundred seventy thousand, thirty".