1690328 has 8 divisors (see below), whose sum is σ = 3169380. Its totient is φ = 845160.

The previous prime is 1690319. The next prime is 1690349. The reversal of 1690328 is 8230961.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1690328.

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 as a sum of consecutive naturals, namely, 105638 + ... + 105653.

2^1690328 is an apocalyptic number.

It is an amenable number.

1690328 is a deficient number, since it is larger than the sum of its proper divisors (1479052).

1690328 is a wasteful number, since it uses less digits than its factorization.

1690328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211297 (or 211293 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1690328 is about 1300.1261477257. The cubic root of 1690328 is about 119.1215480055.

The spelling of 1690328 in words is "one million, six hundred ninety thousand, three hundred twenty-eight".