188100385 has 16 divisors (see below), whose sum is σ = 246514752. Its totient is φ = 136648000.

The previous prime is 188100383. The next prime is 188100389. The reversal of 188100385 is 583001881.

188100385 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 188100385 - 2¹ = 188100383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188100385.

It is not an unprimeable number, because it can be changed into a prime (188100383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78627 + ... + 80983.

It is an arithmetic number, because the mean of its divisors is an integer number (15407172).

Almost surely, 2^188100385 is an apocalyptic number.

It is an amenable number.

188100385 is a deficient number, since it is larger than the sum of its proper divisors (58414367).

188100385 is a wasteful number, since it uses less digits than its factorization.

188100385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 188100385 is about 13714.9693765608. The cubic root of 188100385 is about 572.9673763923.

The spelling of 188100385 in words is "one hundred eighty-eight million, one hundred thousand, three hundred eighty-five".