1043664 has 40 divisors (see below), whose sum is σ = 2856960. Its totient is φ = 327168.

The previous prime is 1043663. The next prime is 1043683. The reversal of 1043664 is 4663401.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043663) 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, 177 + ... + 1455.

It is an arithmetic number, because the mean of its divisors is an integer number (71424).

2^1043664 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 1043664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1428480).

1043664 is an abundant number, since it is smaller than the sum of its proper divisors (1813296).

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

1043664 is a wasteful number, since it uses less digits than its factorization.

1043664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1043664 is about 1021.5987470627. The cubic root of 1043664 is about 101.4347822120.

The spelling of 1043664 in words is "one million, forty-three thousand, six hundred sixty-four".