199923864 has 32 divisors (see below), whose sum is σ = 571211520. Its totient is φ = 57121056.

The previous prime is 199923821. The next prime is 199923877. The reversal of 199923864 is 468329991.

199923864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594844 + ... + 595179.

It is an arithmetic number, because the mean of its divisors is an integer number (17850360).

Almost surely, 2^199923864 is an apocalyptic number.

199923864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

199923864 is an abundant number, since it is smaller than the sum of its proper divisors (371287656).

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

199923864 is a wasteful number, since it uses less digits than its factorization.

199923864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190039 (or 1190035 counting only the distinct ones).

The product of its digits is 839808, while the sum is 51.

The square root of 199923864 is about 14139.4435534076. The cubic root of 199923864 is about 584.7293305526.

The spelling of 199923864 in words is "one hundred ninety-nine million, nine hundred twenty-three thousand, eight hundred sixty-four".