1683428 has 6 divisors (see below), whose sum is σ = 2946006. Its totient is φ = 841712.

The previous prime is 1683403. The next prime is 1683433. The reversal of 1683428 is 8243861.

It can be written as a sum of positive squares in only one way, i.e., 964324 + 719104 = 982^2 + 848^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1683394 and 1683403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210425 + ... + 210432.

It is an arithmetic number, because the mean of its divisors is an integer number (491001).

2^1683428 is an apocalyptic number.

It is an amenable number.

1683428 is a deficient number, since it is larger than the sum of its proper divisors (1262578).

1683428 is a wasteful number, since it uses less digits than its factorization.

1683428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420861 (or 420859 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 1683428 is about 1297.4698455070. The cubic root of 1683428 is about 118.9592403306.

The spelling of 1683428 in words is "one million, six hundred eighty-three thousand, four hundred twenty-eight".