188280090 has 48 divisors (see below), whose sum is σ = 490254336. Its totient is φ = 50133600.

The previous prime is 188280061. The next prime is 188280097. The reversal of 188280090 is 90082881.

It is not an unprimeable number, because it can be changed into a prime (188280097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88135 + ... + 90245.

It is an arithmetic number, because the mean of its divisors is an integer number (10213632).

Almost surely, 2^188280090 is an apocalyptic number.

188280090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188280090 is an abundant number, since it is smaller than the sum of its proper divisors (301974246).

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

188280090 is a wasteful number, since it uses less digits than its factorization.

188280090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115 (or 3112 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 188280090 is about 13721.5192307558. The cubic root of 188280090 is about 573.1497831250.

The spelling of 188280090 in words is "one hundred eighty-eight million, two hundred eighty thousand, ninety".