188813220 has 96 divisors (see below), whose sum is σ = 575019648. Its totient is φ = 46098432.

The previous prime is 188813167. The next prime is 188813221. The reversal of 188813220 is 22318881.

It is not an unprimeable number, because it can be changed into a prime (188813221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35239 + ... + 40241.

It is an arithmetic number, because the mean of its divisors is an integer number (5989788).

Almost surely, 2^188813220 is an apocalyptic number.

188813220 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 188813220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287509824).

188813220 is an abundant number, since it is smaller than the sum of its proper divisors (386206428).

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

188813220 is a wasteful number, since it uses less digits than its factorization.

188813220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5069 (or 5067 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 188813220 is about 13740.9322827820. The cubic root of 188813220 is about 573.6902463391.

The spelling of 188813220 in words is "one hundred eighty-eight million, eight hundred thirteen thousand, two hundred twenty".