99870858 has 24 divisors (see below), whose sum is σ = 216840000. Its totient is φ = 33220584.

The previous prime is 99870857. The next prime is 99870877. The reversal of 99870858 is 85807899.

It is not an unprimeable number, because it can be changed into a prime (99870857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3423 + ... + 14541.

It is an arithmetic number, because the mean of its divisors is an integer number (9035000).

Almost surely, 2^99870858 is an apocalyptic number.

99870858 is an abundant number, since it is smaller than the sum of its proper divisors (116969142).

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

99870858 is a wasteful number, since it uses less digits than its factorization.

99870858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11626 (or 11623 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The square root of 99870858 is about 9993.5408139458. The cubic root of 99870858 is about 463.9589892658.

The spelling of 99870858 in words is "ninety-nine million, eight hundred seventy thousand, eight hundred fifty-eight".