188628380 has 24 divisors (see below), whose sum is σ = 400574160. Its totient is φ = 74602880.

The previous prime is 188628367. The next prime is 188628403. The reversal of 188628380 is 83826881.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51206 + ... + 54765.

It is an arithmetic number, because the mean of its divisors is an integer number (16690590).

Almost surely, 2^188628380 is an apocalyptic number.

188628380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188628380 is an abundant number, since it is smaller than the sum of its proper divisors (211945780).

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

188628380 is a wasteful number, since it uses less digits than its factorization.

188628380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106069 (or 106067 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 188628380 is about 13734.2047458162. The cubic root of 188628380 is about 573.5029792132.

The spelling of 188628380 in words is "one hundred eighty-eight million, six hundred twenty-eight thousand, three hundred eighty".