1662000 has 80 divisors (see below), whose sum is σ = 5377632. Its totient is φ = 441600.

The previous prime is 1661983. The next prime is 1662007. The reversal of 1662000 is 2661.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1662007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5862 + ... + 6138.

2^1662000 is an apocalyptic number.

1662000 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 1662000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2688816).

1662000 is an abundant number, since it is smaller than the sum of its proper divisors (3715632).

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

1662000 is a wasteful number, since it uses less digits than its factorization.

1662000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1662000 is about 1289.1857895587. The cubic root of 1662000 is about 118.4523478043.

Adding to 1662000 its reverse (2661), we get a palindrome (1664661).

The spelling of 1662000 in words is "one million, six hundred sixty-two thousand".