188420 has 12 divisors (see below), whose sum is σ = 395724. Its totient is φ = 75360.

The previous prime is 188417. The next prime is 188431. The reversal of 188420 is 24881.

It can be written as a sum of positive squares in 2 ways, for example, as 64516 + 123904 = 254^2 + 352^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4691 + ... + 4730.

It is an arithmetic number, because the mean of its divisors is an integer number (32977).

2¹⁸⁸⁴²⁰ is an apocalyptic number.

188420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188420 is an abundant number, since it is smaller than the sum of its proper divisors (207304).

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

188420 is a wasteful number, since it uses less digits than its factorization.

188420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9430 (or 9428 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 188420 is about 434.0737264567. The cubic root of 188420 is about 57.3291716227.

The spelling of 188420 in words is "one hundred eighty-eight thousand, four hundred twenty".