1660028 has 12 divisors (see below), whose sum is σ = 2938320. Its totient is φ = 820512.

The previous prime is 1660007. The next prime is 1660037. The reversal of 1660028 is 8200661.

It is a junction number, because it is equal to n+sod(n) for n = 1659985 and 1660012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1976 + ... + 2687.

It is an arithmetic number, because the mean of its divisors is an integer number (244860).

2^1660028 is an apocalyptic number.

It is an amenable number.

1660028 is a deficient number, since it is larger than the sum of its proper divisors (1278292).

1660028 is a wasteful number, since it uses less digits than its factorization.

1660028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756 (or 4754 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1660028 is about 1288.4207387341. The cubic root of 1660028 is about 118.4054804804.

Adding to 1660028 its reverse (8200661), we get a palindrome (9860689).

The spelling of 1660028 in words is "one million, six hundred sixty thousand, twenty-eight".