188380645 has 8 divisors (see below), whose sum is σ = 233349120. Its totient is φ = 145842960.

The previous prime is 188380639. The next prime is 188380651. The reversal of 188380645 is 546083881.

It is an interprime number because it is at equal distance from previous prime (188380639) and next prime (188380651).

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

It is not a de Polignac number, because 188380645 - 2⁵ = 188380613 is a prime.

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, 607525 + ... + 607834.

It is an arithmetic number, because the mean of its divisors is an integer number (29168640).

Almost surely, 2^188380645 is an apocalyptic number.

It is an amenable number.

188380645 is a deficient number, since it is larger than the sum of its proper divisors (44968475).

188380645 is a wasteful number, since it uses less digits than its factorization.

188380645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215395.

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 188380645 is about 13725.1828767416. The cubic root of 188380645 is about 573.2517992568.

It can be divided in two parts, 1883 and 80645, that added together give a palindrome (82528).

The spelling of 188380645 in words is "one hundred eighty-eight million, three hundred eighty thousand, six hundred forty-five".