189800080 has 20 divisors (see below), whose sum is σ = 441285372. Its totient is φ = 75920000.

The previous prime is 189800059. The next prime is 189800089. The reversal of 189800080 is 80008981.

It can be written as a sum of positive squares in 2 ways, for example, as 70291456 + 119508624 = 8384^2 + 10932^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (189800089) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1186171 + ... + 1186330.

Almost surely, 2^189800080 is an apocalyptic number.

189800080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189800080 is an abundant number, since it is smaller than the sum of its proper divisors (251485292).

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

189800080 is a wasteful number, since it uses less digits than its factorization.

189800080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372514 (or 2372508 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 189800080 is about 13776.7949828688. The cubic root of 189800080 is about 574.6880021316.

The spelling of 189800080 in words is "one hundred eighty-nine million, eight hundred thousand, eighty".