191385144 has 48 divisors (see below), whose sum is σ = 527131800. Its totient is φ = 62712384.

The previous prime is 191385113. The next prime is 191385149. The reversal of 191385144 is 441583191.

191385144 is a `hidden beast` number, since 1 + 9 + 138 + 514 + 4 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 191385099 and 191385108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191385149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18279 + ... + 26774.

Almost surely, 2^191385144 is an apocalyptic number.

It is an amenable number.

191385144 is an abundant number, since it is smaller than the sum of its proper divisors (335746656).

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

191385144 is a wasteful number, since it uses less digits than its factorization.

191385144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45124 (or 45117 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 191385144 is about 13834.2019646960. The cubic root of 191385144 is about 576.2833530634.

The spelling of 191385144 in words is "one hundred ninety-one million, three hundred eighty-five thousand, one hundred forty-four".