1663344 has 30 divisors (see below), whose sum is σ = 4655456. Its totient is φ = 554400.

The previous prime is 1663327. The next prime is 1663349. The reversal of 1663344 is 4433661.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5632 + ... + 5919.

2^1663344 is an apocalyptic number.

It is an amenable number.

1663344 is an abundant number, since it is smaller than the sum of its proper divisors (2992112).

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

1663344 is a wasteful number, since it uses less digits than its factorization.

1663344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11565 (or 11556 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 1663344 is about 1289.7069434565. The cubic root of 1663344 is about 118.4842685948.

The spelling of 1663344 in words is "one million, six hundred sixty-three thousand, three hundred forty-four".