1662180 has 48 divisors (see below), whose sum is σ = 5014464. Its totient is φ = 408960.

The previous prime is 1662163. The next prime is 1662191. The reversal of 1662180 is 812661.

It is a self number, because there is not a number n which added to its sum of digits gives 1662180.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 286 + ... + 1845.

It is an arithmetic number, because the mean of its divisors is an integer number (104468).

2^1662180 is an apocalyptic number.

1662180 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 1662180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2507232).

1662180 is an abundant number, since it is smaller than the sum of its proper divisors (3352284).

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

1662180 is a wasteful number, since it uses less digits than its factorization.

1662180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156 (or 2154 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1662180 is about 1289.2555991734. The cubic root of 1662180 is about 118.4566239079.

It can be divided in two parts, 166 and 2180, that added together give a triangular number (2346 = T₆₈).

The spelling of 1662180 in words is "one million, six hundred sixty-two thousand, one hundred eighty".