1789138 has 8 divisors (see below), whose sum is σ = 2890188. Its totient is φ = 825744.

The previous prime is 1789093. The next prime is 1789153. The reversal of 1789138 is 8319871.

It can be written as a sum of positive squares in 2 ways, for example, as 1750329 + 38809 = 1323^2 + 197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1789097 and 1789106.

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 in 3 ways as a sum of consecutive naturals, for example, 34381 + ... + 34432.

2^1789138 is an apocalyptic number.

1789138 is a deficient number, since it is larger than the sum of its proper divisors (1101050).

1789138 is a wasteful number, since it uses less digits than its factorization.

1789138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68828.

The product of its digits is 12096, while the sum is 37.

The square root of 1789138 is about 1337.5866327083. The cubic root of 1789138 is about 121.3988613424.

It can be divided in two parts, 178 and 9138, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 1789138 in words is "one million, seven hundred eighty-nine thousand, one hundred thirty-eight".