1668472 has 32 divisors (see below), whose sum is σ = 3437280. Its totient is φ = 754560.

The previous prime is 1668467. The next prime is 1668473. The reversal of 1668472 is 2748661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6213 + ... + 6475.

It is an arithmetic number, because the mean of its divisors is an integer number (107415).

2^1668472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718640).

1668472 is an abundant number, since it is smaller than the sum of its proper divisors (1768808).

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

1668472 is a wasteful number, since it uses less digits than its factorization.

1668472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 339 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 1668472 is about 1291.6934620877. The cubic root of 1668472 is about 118.6059038890.

The spelling of 1668472 in words is "one million, six hundred sixty-eight thousand, four hundred seventy-two".