704138 has 4 divisors (see below), whose sum is σ = 1056210. Its totient is φ = 352068.

The previous prime is 704131. The next prime is 704141. The reversal of 704138 is 831407.

It is a happy number.

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., 426409 + 277729 = 653^2 + 527^2 .

It is not an unprimeable number, because it can be changed into a prime (704131) by changing a digit.

704138 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 176033 + ... + 176036.

2⁷⁰⁴¹³⁸ is an apocalyptic number.

704138 is a deficient number, since it is larger than the sum of its proper divisors (352072).

704138 is a wasteful number, since it uses less digits than its factorization.

704138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352071.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 704138 is about 839.1293106548. The cubic root of 704138 is about 88.9650159182.

The spelling of 704138 in words is "seven hundred four thousand, one hundred thirty-eight".