99998870 has 32 divisors (see below), whose sum is σ = 187038720. Its totient is φ = 38452320.

The previous prime is 99998869. The next prime is 99998891. The reversal of 99998870 is 7889999.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 49541 + ... + 51519.

It is an arithmetic number, because the mean of its divisors is an integer number (5844960).

Almost surely, 2^99998870 is an apocalyptic number.

99998870 is a deficient number, since it is larger than the sum of its proper divisors (87039850).

99998870 is a wasteful number, since it uses less digits than its factorization.

99998870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The square root of 99998870 is about 9999.9434998404. The cubic root of 99998870 is about 464.1571350229.

The spelling of 99998870 in words is "ninety-nine million, nine hundred ninety-eight thousand, eight hundred seventy".