1723664 has 20 divisors (see below), whose sum is σ = 3536604. Its totient is φ = 811008.

The previous prime is 1723651. The next prime is 1723669. The reversal of 1723664 is 4663271.

It can be written as a sum of positive squares in 2 ways, for example, as 984064 + 739600 = 992^2 + 860^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1723669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2897 + ... + 3440.

2^1723664 is an apocalyptic number.

It is an amenable number.

1723664 is an abundant number, since it is smaller than the sum of its proper divisors (1812940).

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

1723664 is a wasteful number, since it uses less digits than its factorization.

1723664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6362 (or 6356 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 1723664 is about 1312.8838486325. The cubic root of 1723664 is about 119.8995455606.

The spelling of 1723664 in words is "one million, seven hundred twenty-three thousand, six hundred sixty-four".