1662318 has 48 divisors (see below), whose sum is σ = 4193280. Its totient is φ = 466128.

The previous prime is 1662307. The next prime is 1662319. The reversal of 1662318 is 8132661.

It is a super-2 number, since 2×1662318² = 5526602266248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1662291 and 1662300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9871 + ... + 10037.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

2^1662318 is an apocalyptic number.

1662318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2096640).

1662318 is an abundant number, since it is smaller than the sum of its proper divisors (2530962).

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

1662318 is a wasteful number, since it uses less digits than its factorization.

1662318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 258 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1662318 is about 1289.3091173183. The cubic root of 1662318 is about 118.4599020450.

Adding to 1662318 its reverse (8132661), we get a palindrome (9794979).

It can be divided in two parts, 16623 and 18, that added together give a square (16641 = 129²).

The spelling of 1662318 in words is "one million, six hundred sixty-two thousand, three hundred eighteen".