188484840 has 128 divisors (see below), whose sum is σ = 632160000. Its totient is φ = 49953024.

The previous prime is 188484827. The next prime is 188484841. The reversal of 188484840 is 48484881.

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

It is not an unprimeable number, because it can be changed into a prime (188484841) by changing a digit.

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, 214482 + ... + 215358.

It is an arithmetic number, because the mean of its divisors is an integer number (4938750).

Almost surely, 2^188484840 is an apocalyptic number.

188484840 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 188484840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316080000).

188484840 is an abundant number, since it is smaller than the sum of its proper divisors (443675160).

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

188484840 is a wasteful number, since it uses less digits than its factorization.

188484840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096 (or 1086 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 45.

The square root of 188484840 is about 13728.9781120082. The cubic root of 188484840 is about 573.3574699892.

The spelling of 188484840 in words is "one hundred eighty-eight million, four hundred eighty-four thousand, eight hundred forty".