1768138 has 4 divisors (see below), whose sum is σ = 2652210. Its totient is φ = 884068.

The previous prime is 1768127. The next prime is 1768141. The reversal of 1768138 is 8318671.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1006009 + 762129 = 1003^2 + 873^2 .

It is an Ulam number.

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, 442033 + ... + 442036.

2^1768138 is an apocalyptic number.

1768138 is a deficient number, since it is larger than the sum of its proper divisors (884072).

1768138 is an equidigital number, since it uses as much as digits as its factorization.

1768138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884071.

The product of its digits is 8064, while the sum is 34.

The square root of 1768138 is about 1329.7135029772. The cubic root of 1768138 is about 120.9220179176.

The spelling of 1768138 in words is "one million, seven hundred sixty-eight thousand, one hundred thirty-eight".