199755858 has 16 divisors (see below), whose sum is σ = 400170816. Its totient is φ = 66475440.

The previous prime is 199755841. The next prime is 199755869. The reversal of 199755858 is 858557991.

It is a junction number, because it is equal to n+sod(n) for n = 199755798 and 199755807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23478 + ... + 30833.

It is an arithmetic number, because the mean of its divisors is an integer number (25010676).

Almost surely, 2^199755858 is an apocalyptic number.

199755858 is an abundant number, since it is smaller than the sum of its proper divisors (200414958).

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

199755858 is a wasteful number, since it uses less digits than its factorization.

199755858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54929.

The product of its digits is 4536000, while the sum is 57.

The square root of 199755858 is about 14133.5012647256. The cubic root of 199755858 is about 584.5654922379.

The spelling of 199755858 in words is "one hundred ninety-nine million, seven hundred fifty-five thousand, eight hundred fifty-eight".