188144894 has 8 divisors (see below), whose sum is σ = 322534128. Its totient is φ = 80633520.

The previous prime is 188144893. The next prime is 188144903. The reversal of 188144894 is 498441881.

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

It is a super-2 number, since 2×188144894² = 70797002276542472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188144893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6719447 + ... + 6719474.

It is an arithmetic number, because the mean of its divisors is an integer number (40316766).

Almost surely, 2^188144894 is an apocalyptic number.

188144894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

188144894 is a deficient number, since it is larger than the sum of its proper divisors (134389234).

188144894 is a wasteful number, since it uses less digits than its factorization.

188144894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13438930.

The product of its digits is 294912, while the sum is 47.

The square root of 188144894 is about 13716.5919236522. The cubic root of 188144894 is about 573.0125653725.

The spelling of 188144894 in words is "one hundred eighty-eight million, one hundred forty-four thousand, eight hundred ninety-four".