1663436 has 12 divisors (see below), whose sum is σ = 2931600. Its totient is φ = 825840.

The previous prime is 1663397. The next prime is 1663457. The reversal of 1663436 is 6343661.

It is a junction number, because it is equal to n+sod(n) for n = 1663399 and 1663408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800 + ... + 1991.

It is an arithmetic number, because the mean of its divisors is an integer number (244300).

2^1663436 is an apocalyptic number.

It is an amenable number.

1663436 is a deficient number, since it is larger than the sum of its proper divisors (1268164).

1663436 is a wasteful number, since it uses less digits than its factorization.

1663436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2944 (or 2942 counting only the distinct ones).

The product of its digits is 7776, while the sum is 29.

The square root of 1663436 is about 1289.7426099808. The cubic root of 1663436 is about 118.4864530200.

The spelling of 1663436 in words is "one million, six hundred sixty-three thousand, four hundred thirty-six".