1791664 has 40 divisors (see below), whose sum is σ = 4205088. Its totient is φ = 721920.

The previous prime is 1791637. The next prime is 1791679. The reversal of 1791664 is 4661971.

It is a Harshad number since it is a multiple of its sum of digits (34).

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 7 ways as a sum of consecutive naturals, for example, 1434 + ... + 2374.

2^1791664 is an apocalyptic number.

1791664 is a gapful number since it is divisible by the number (14) 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 1791664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102544).

1791664 is an abundant number, since it is smaller than the sum of its proper divisors (2413424).

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

1791664 is a wasteful number, since it uses less digits than its factorization.

1791664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973 (or 967 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 1791664 is about 1338.5305375672. The cubic root of 1791664 is about 121.4559669281.

The spelling of 1791664 in words is "one million, seven hundred ninety-one thousand, six hundred sixty-four".