704240 has 20 divisors (see below), whose sum is σ = 1637544. Its totient is φ = 281664.

The previous prime is 704233. The next prime is 704243. The reversal of 704240 is 42407.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (704243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4322 + ... + 4481.

2⁷⁰⁴²⁴⁰ is an apocalyptic number.

It is an amenable number.

704240 is an abundant number, since it is smaller than the sum of its proper divisors (933304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

704240 is a wasteful number, since it uses less digits than its factorization.

704240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8816 (or 8810 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 704240 is about 839.1900857374. The cubic root of 704240 is about 88.9693114747.

Adding to 704240 its reverse (42407), we get a palindrome (746647).

The spelling of 704240 in words is "seven hundred four thousand, two hundred forty", and thus it is an iban number.