188113320 has 128 divisors (see below), whose sum is σ = 654393600. Its totient is φ = 47976192.

The previous prime is 188113283. The next prime is 188113333. The reversal of 188113320 is 23311881.

It is a super-2 number, since 2×188113320² = 70773242322844800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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, 21054 + ... + 28626.

It is an arithmetic number, because the mean of its divisors is an integer number (5112450).

Almost surely, 2^188113320 is an apocalyptic number.

188113320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188113320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327196800).

188113320 is an abundant number, since it is smaller than the sum of its proper divisors (466280280).

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

188113320 is a wasteful number, since it uses less digits than its factorization.

188113320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7616 (or 7606 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 188113320 is about 13715.4409334881. The cubic root of 188113320 is about 572.9805097397.

The spelling of 188113320 in words is "one hundred eighty-eight million, one hundred thirteen thousand, three hundred twenty".