188385530 has 8 divisors (see below), whose sum is σ = 339093972. Its totient is φ = 75354208.

The previous prime is 188385521. The next prime is 188385553. The reversal of 188385530 is 35583881.

It can be written as a sum of positive squares in 2 ways, for example, as 188156089 + 229441 = 13717^2 + 479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9419267 + ... + 9419286.

Almost surely, 2^188385530 is an apocalyptic number.

188385530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188385530 is a deficient number, since it is larger than the sum of its proper divisors (150708442).

188385530 is a wasteful number, since it uses less digits than its factorization.

188385530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18838560.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 188385530 is about 13725.3608331439. The cubic root of 188385530 is about 573.2567543143.

The spelling of 188385530 in words is "one hundred eighty-eight million, three hundred eighty-five thousand, five hundred thirty".