704681680 has 20 divisors (see below), whose sum is σ = 1638385092. Its totient is φ = 281872640.

The previous prime is 704681657. The next prime is 704681707. The reversal of 704681680 is 86186407.

It can be written as a sum of positive squares in 2 ways, for example, as 368179344 + 336502336 = 19188^2 + 18344^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4404181 + ... + 4404340.

Almost surely, 2^704681680 is an apocalyptic number.

It is an amenable number.

704681680 is an abundant number, since it is smaller than the sum of its proper divisors (933703412).

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

704681680 is a wasteful number, since it uses less digits than its factorization.

704681680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8808534 (or 8808528 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 704681680 is about 26545.8411055291. The cubic root of 704681680 is about 889.8790729106.

The spelling of 704681680 in words is "seven hundred four million, six hundred eighty-one thousand, six hundred eighty".