199133028 has 18 divisors (see below), whose sum is σ = 503364134. Its totient is φ = 66377664.

The previous prime is 199133021. The next prime is 199133029. The reversal of 199133028 is 820331991.

It can be written as a sum of positive squares in only one way, i.e., 163635264 + 35497764 = 12792^2 + 5958^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5531473 = 199133028 / (1 + 9 + 9 + 1 + 3 + 3 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 199132983 and 199133001.

It is not an unprimeable number, because it can be changed into a prime (199133021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2765701 + ... + 2765772.

Almost surely, 2^199133028 is an apocalyptic number.

199133028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

199133028 is an abundant number, since it is smaller than the sum of its proper divisors (304231106).

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

199133028 is a wasteful number, since it uses less digits than its factorization.

199133028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531483 (or 5531478 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 199133028 is about 14111.4502443937. The cubic root of 199133028 is about 583.9573098525.

The spelling of 199133028 in words is "one hundred ninety-nine million, one hundred thirty-three thousand, twenty-eight".