187220 has 48 divisors (see below), whose sum is σ = 459648. Its totient is φ = 63360.

The previous prime is 187219. The next prime is 187223. The reversal of 187220 is 22781.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 187192 and 187201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5042 + ... + 5078.

It is an arithmetic number, because the mean of its divisors is an integer number (9576).

2¹⁸⁷²²⁰ is an apocalyptic number.

187220 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 187220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229824).

187220 is an abundant number, since it is smaller than the sum of its proper divisors (272428).

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

187220 is a wasteful number, since it uses less digits than its factorization.

187220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 187220 is about 432.6892649466. The cubic root of 187220 is about 57.2072072683.

The spelling of 187220 in words is "one hundred eighty-seven thousand, two hundred twenty".