187680385 has 16 divisors (see below), whose sum is σ = 238132800. Its totient is φ = 141604416.

The previous prime is 187680377. The next prime is 187680397. The reversal of 187680385 is 583086781.

187680385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 187680385 - 2³ = 187680377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17442 + ... + 26068.

It is an arithmetic number, because the mean of its divisors is an integer number (14883300).

Almost surely, 2^187680385 is an apocalyptic number.

It is an amenable number.

187680385 is a deficient number, since it is larger than the sum of its proper divisors (50452415).

187680385 is a wasteful number, since it uses less digits than its factorization.

187680385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8880.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 187680385 is about 13699.6490830970. The cubic root of 187680385 is about 572.5406084732.

The spelling of 187680385 in words is "one hundred eighty-seven million, six hundred eighty thousand, three hundred eighty-five".