188850990 has 16 divisors (see below), whose sum is σ = 453242448. Its totient is φ = 50360256.

The previous prime is 188850989. The next prime is 188851007. The reversal of 188850990 is 99058881.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3147487 + ... + 3147546.

It is an arithmetic number, because the mean of its divisors is an integer number (28327653).

Almost surely, 2^188850990 is an apocalyptic number.

188850990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188850990 is an abundant number, since it is smaller than the sum of its proper divisors (264391458).

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

188850990 is a wasteful number, since it uses less digits than its factorization.

188850990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6295043.

The product of its (nonzero) digits is 207360, while the sum is 48.

The square root of 188850990 is about 13742.3065749531. The cubic root of 188850990 is about 573.7284972552.

The spelling of 188850990 in words is "one hundred eighty-eight million, eight hundred fifty thousand, nine hundred ninety".