1186220 has 48 divisors (see below), whose sum is σ = 2936640. Its totient is φ = 393984.

The previous prime is 1186217. The next prime is 1186231. The reversal of 1186220 is 226811.

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

It is a junction number, because it is equal to n+sod(n) for n = 1186192 and 1186201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5066 + ... + 5294.

It is an arithmetic number, because the mean of its divisors is an integer number (61180).

2^1186220 is an apocalyptic number.

1186220 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 1186220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1468320).

1186220 is an abundant number, since it is smaller than the sum of its proper divisors (1750420).

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

1186220 is a wasteful number, since it uses less digits than its factorization.

1186220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1186220 is about 1089.1372732581. The cubic root of 1186220 is about 105.8575278280.

The spelling of 1186220 in words is "one million, one hundred eighty-six thousand, two hundred twenty".