1018220 has 36 divisors (see below), whose sum is σ = 2489760. Its totient is φ = 348768.

The previous prime is 1018217. The next prime is 1018223. The reversal of 1018220 is 228101.

It is an interprime number because it is at equal distance from previous prime (1018217) and next prime (1018223).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1018195 and 1018204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461 + ... + 1499.

It is an arithmetic number, because the mean of its divisors is an integer number (69160).

2^1018220 is an apocalyptic number.

1018220 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 1018220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1244880).

1018220 is an abundant number, since it is smaller than the sum of its proper divisors (1471540).

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

1018220 is a wasteful number, since it uses less digits than its factorization.

1018220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1053 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1018220 is about 1009.0688777284. The cubic root of 1018220 is about 100.6036816842.

The spelling of 1018220 in words is "one million, eighteen thousand, two hundred twenty".