189839880 has 48 divisors (see below), whose sum is σ = 616980780. Its totient is φ = 50623872.

The previous prime is 189839879. The next prime is 189839899. The reversal of 189839880 is 88938981.

It can be written as a sum of positive squares in 2 ways, for example, as 188952516 + 887364 = 13746^2 + 942^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 263307 + ... + 264026.

Almost surely, 2^189839880 is an apocalyptic number.

189839880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189839880 is an abundant number, since it is smaller than the sum of its proper divisors (427140900).

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

189839880 is a wasteful number, since it uses less digits than its factorization.

189839880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527350 (or 527343 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 189839880 is about 13778.2393650277. The cubic root of 189839880 is about 574.7281689287.

The spelling of 189839880 in words is "one hundred eighty-nine million, eight hundred thirty-nine thousand, eight hundred eighty".