188906670 has 48 divisors (see below), whose sum is σ = 494488800. Its totient is φ = 50033472.

The previous prime is 188906629. The next prime is 188906671. The reversal of 188906670 is 76609881.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188906671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6367 + ... + 20453.

It is an arithmetic number, because the mean of its divisors is an integer number (10301850).

Almost surely, 2^188906670 is an apocalyptic number.

188906670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 188906670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247244400).

188906670 is an abundant number, since it is smaller than the sum of its proper divisors (305582130).

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

188906670 is a wasteful number, since it uses less digits than its factorization.

188906670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14249 (or 14246 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 188906670 is about 13744.3322864372. The cubic root of 188906670 is about 573.7848769150.

The spelling of 188906670 in words is "one hundred eighty-eight million, nine hundred six thousand, six hundred seventy".