1663244 has 24 divisors (see below), whose sum is σ = 3214848. Its totient is φ = 746640.

The previous prime is 1663223. The next prime is 1663267. The reversal of 1663244 is 4423661.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a d-powerful number, because it can be written as 1 + 6² + 6⁴ + 3¹³ + 2¹¹ + 4 + 4⁸ .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4349 + ... + 4715.

It is an arithmetic number, because the mean of its divisors is an integer number (133952).

2^1663244 is an apocalyptic number.

It is an amenable number.

1663244 is a deficient number, since it is larger than the sum of its proper divisors (1551604).

1663244 is a wasteful number, since it uses less digits than its factorization.

1663244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 483 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 1663244 is about 1289.6681743766. The cubic root of 1663244 is about 118.4818941282.

The spelling of 1663244 in words is "one million, six hundred sixty-three thousand, two hundred forty-four".