704561640 has 64 divisors (see below), whose sum is σ = 2115590400. Its totient is φ = 187713792.

The previous prime is 704561609. The next prime is 704561653. The reversal of 704561640 is 46165407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188106 + ... + 191814.

It is an arithmetic number, because the mean of its divisors is an integer number (33056100).

Almost surely, 2^704561640 is an apocalyptic number.

It is an amenable number.

704561640 is an abundant number, since it is smaller than the sum of its proper divisors (1411028760).

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

704561640 is a wasteful number, since it uses less digits than its factorization.

704561640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306 (or 5302 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 704561640 is about 26543.5800147606. The cubic root of 704561640 is about 889.8285408036.

It can be divided in two parts, 70 and 4561640, that added together give a triangular number (4561710 = T₃₀₂₀).

The spelling of 704561640 in words is "seven hundred four million, five hundred sixty-one thousand, six hundred forty".