199331928 has 64 divisors (see below), whose sum is σ = 560584800. Its totient is φ = 66438144.

The previous prime is 199331927. The next prime is 199331941. The reversal of 199331928 is 829133991.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199331921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11800 + ... + 23192.

Almost surely, 2^199331928 is an apocalyptic number.

199331928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199331928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280292400).

199331928 is an abundant number, since it is smaller than the sum of its proper divisors (361252872).

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

199331928 is an equidigital number, since it uses as much as digits as its factorization.

199331928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11420 (or 11398 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 199331928 is about 14118.4959538897. The cubic root of 199331928 is about 584.1516698079.

The spelling of 199331928 in words is "one hundred ninety-nine million, three hundred thirty-one thousand, nine hundred twenty-eight".