199456128 has 64 divisors (see below), whose sum is σ = 588682800. Its totient is φ = 66484224.

The previous prime is 199456123. The next prime is 199456141. The reversal of 199456128 is 821654991.

199456128 is a `hidden beast` number, since 199 + 456 + 1 + 2 + 8 = 666.

199456128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199456123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25401 + ... + 32312.

Almost surely, 2^199456128 is an apocalyptic number.

199456128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

199456128 is an abundant number, since it is smaller than the sum of its proper divisors (389226672).

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

199456128 is an equidigital number, since it uses as much as digits as its factorization.

199456128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57736 (or 57718 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 199456128 is about 14122.8937544683. The cubic root of 199456128 is about 584.2729692819.

The spelling of 199456128 in words is "one hundred ninety-nine million, four hundred fifty-six thousand, one hundred twenty-eight".