1669828 has 6 divisors (see below), whose sum is σ = 2922206. Its totient is φ = 834912.

The previous prime is 1669817. The next prime is 1669861. The reversal of 1669828 is 8289661.

It can be written as a sum of positive squares in only one way, i.e., 1249924 + 419904 = 1118^2 + 648^2 .

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 as a sum of consecutive naturals, namely, 208725 + ... + 208732.

2^1669828 is an apocalyptic number.

It is an amenable number.

1669828 is a deficient number, since it is larger than the sum of its proper divisors (1252378).

1669828 is a wasteful number, since it uses less digits than its factorization.

1669828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417461 (or 417459 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 1669828 is about 1292.2182478204. The cubic root of 1669828 is about 118.6380263051.

The spelling of 1669828 in words is "one million, six hundred sixty-nine thousand, eight hundred twenty-eight".