1663028 has 12 divisors (see below), whose sum is σ = 2927652. Its totient is φ = 826560.

The previous prime is 1663027. The next prime is 1663031. The reversal of 1663028 is 8203661.

It can be written as a sum of positive squares in 2 ways, for example, as 289444 + 1373584 = 538^2 + 1172^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1662988 and 1663006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663027) 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, 425 + ... + 1872.

It is an arithmetic number, because the mean of its divisors is an integer number (243971).

2^1663028 is an apocalyptic number.

It is an amenable number.

1663028 is a deficient number, since it is larger than the sum of its proper divisors (1264624).

1663028 is a wasteful number, since it uses less digits than its factorization.

1663028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1663028 is about 1289.5844291864. The cubic root of 1663028 is about 118.4767649555.

Adding to 1663028 its reverse (8203661), we get a palindrome (9866689).

The spelling of 1663028 in words is "one million, six hundred sixty-three thousand, twenty-eight".