1228180 has 12 divisors (see below), whose sum is σ = 2579220. Its totient is φ = 491264.

The previous prime is 1228163. The next prime is 1228181. The reversal of 1228180 is 818221.

It can be written as a sum of positive squares in 2 ways, for example, as 898704 + 329476 = 948^2 + 574^2 .

It is a super-2 number, since 2×1228180² = 3016852224800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228181) 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 3 ways as a sum of consecutive naturals, for example, 30685 + ... + 30724.

It is an arithmetic number, because the mean of its divisors is an integer number (214935).

2^1228180 is an apocalyptic number.

1228180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228180 is an abundant number, since it is smaller than the sum of its proper divisors (1351040).

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

1228180 is a wasteful number, since it uses less digits than its factorization.

1228180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61418 (or 61416 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1228180 is about 1108.2328275232. The cubic root of 1228180 is about 107.0912547278.

The spelling of 1228180 in words is "one million, two hundred twenty-eight thousand, one hundred eighty".