704128 has 16 divisors (see below), whose sum is σ = 1403010. Its totient is φ = 352000.

The previous prime is 704117. The next prime is 704131. The reversal of 704128 is 821407.

It can be written as a sum of positive squares in only one way, i.e., 399424 + 304704 = 632^2 + 552^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 704099 and 704108.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2623 + ... + 2878.

2⁷⁰⁴¹²⁸ is an apocalyptic number.

It is an amenable number.

704128 is a deficient number, since it is larger than the sum of its proper divisors (698882).

704128 is an equidigital number, since it uses as much as digits as its factorization.

704128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5515 (or 5503 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 704128 is about 839.1233520764. The cubic root of 704128 is about 88.9645947629.

The spelling of 704128 in words is "seven hundred four thousand, one hundred twenty-eight".