188720070 has 144 divisors (see below), whose sum is σ = 579673584. Its totient is φ = 39177600.

The previous prime is 188720047. The next prime is 188720071. The reversal of 188720070 is 70027881.

188720070 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188720071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 177340 + ... + 178400.

It is an arithmetic number, because the mean of its divisors is an integer number (4025511).

Almost surely, 2^188720070 is an apocalyptic number.

188720070 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 188720070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289836792).

188720070 is an abundant number, since it is smaller than the sum of its proper divisors (390953514).

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

188720070 is a wasteful number, since it uses less digits than its factorization.

188720070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107 (or 1089 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 188720070 is about 13737.5423566226. The cubic root of 188720070 is about 573.5958884743.

The spelling of 188720070 in words is "one hundred eighty-eight million, seven hundred twenty thousand, seventy".