188228660 has 24 divisors (see below), whose sum is σ = 398303136. Its totient is φ = 74715680.

The previous prime is 188228659. The next prime is 188228701. The reversal of 188228660 is 66822881.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 33302 + ... + 38541.

It is an arithmetic number, because the mean of its divisors is an integer number (16595964).

Almost surely, 2^188228660 is an apocalyptic number.

188228660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188228660 is an abundant number, since it is smaller than the sum of its proper divisors (210074476).

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

188228660 is a wasteful number, since it uses less digits than its factorization.

188228660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71983 (or 71981 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 188228660 is about 13719.6450391400. The cubic root of 188228660 is about 573.0975917723.

The spelling of 188228660 in words is "one hundred eighty-eight million, two hundred twenty-eight thousand, six hundred sixty".