• 704 can be written using four 4's:
704 has 14 divisors (see below), whose sum is σ = 1524. Its totient is φ = 320.
The previous prime is 701. The next prime is 709. The reversal of 704 is 407.
It is a Harshad number since it is a multiple of its sum of digits (11).
It is a pancake number, because a pancake can be divided into 704 parts by 37 straight cuts.
It is a nialpdrome in base 9 and base 13.
It is not an unprimeable number, because it can be changed into a prime (701) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (3) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59 + ... + 69.
2704 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (762).
704 is an abundant number, since it is smaller than the sum of its proper divisors (820).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
704 is a wasteful number, since it uses less digits than its factorization.
704 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 23 (or 13 counting only the distinct ones).
The product of its (nonzero) digits is 28, while the sum is 11.
The square root of 704 is about 26.5329983228. The cubic root of 704 is about 8.8959203623.
Multiplying 704 by its sum of digits (11), we get a square (7744 = 882).
704 divided by its sum of digits (11) gives a 6-th power (64 = 26).
Subtracting from 704 its product of nonzero digits (28), we obtain a palindrome (676).
Adding to 704 its reverse (407), we get a palindrome (1111).
The spelling of 704 in words is "seven hundred four", and thus it is an aban number and an iban number.
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