188457489 has 32 divisors (see below), whose sum is σ = 306218880. Its totient is φ = 113601600.

The previous prime is 188457481. The next prime is 188457491. The reversal of 188457489 is 984754881.

188457489 is a `hidden beast` number, since 188 + 457 + 4 + 8 + 9 = 666.

It is not a de Polignac number, because 188457489 - 2³ = 188457481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188457481) 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 31 ways as a sum of consecutive naturals, for example, 56899 + ... + 60119.

It is an arithmetic number, because the mean of its divisors is an integer number (9569340).

Almost surely, 2^188457489 is an apocalyptic number.

It is an amenable number.

188457489 is a deficient number, since it is larger than the sum of its proper divisors (117761391).

188457489 is a wasteful number, since it uses less digits than its factorization.

188457489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438 (or 3432 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The square root of 188457489 is about 13727.9819711420. The cubic root of 188457489 is about 573.3297353824.

The spelling of 188457489 in words is "one hundred eighty-eight million, four hundred fifty-seven thousand, four hundred eighty-nine".