1690768 has 10 divisors (see below), whose sum is σ = 3275894. Its totient is φ = 845376.

The previous prime is 1690757. The next prime is 1690781. The reversal of 1690768 is 8670961.

It can be written as a sum of positive squares in only one way, i.e., 1607824 + 82944 = 1268^2 + 288^2 .

It is a nialpdrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52821 + ... + 52852.

2^1690768 is an apocalyptic number.

It is an amenable number.

1690768 is a deficient number, since it is larger than the sum of its proper divisors (1585126).

1690768 is a wasteful number, since it uses less digits than its factorization.

1690768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105681 (or 105675 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1690768 is about 1300.2953510645. The cubic root of 1690768 is about 119.1318830674.

The spelling of 1690768 in words is "one million, six hundred ninety thousand, seven hundred sixty-eight".