704720520 has 384 divisors, whose sum is σ = 2802643200. Its totient is φ = 154275840.

The previous prime is 704720519. The next prime is 704720543. The reversal of 704720520 is 25027407.

704720520 is a `hidden beast` number, since 70 + 4 + 72 + 0 + 520 = 666.

It is a super-2 number, since 2×704720520² = 993262022618140800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7265112 + ... + 7265208.

It is an arithmetic number, because the mean of its divisors is an integer number (7298550).

Almost surely, 2^704720520 is an apocalyptic number.

704720520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 704720520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1401321600).

704720520 is an abundant number, since it is smaller than the sum of its proper divisors (2097922680).

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

704720520 is a wasteful number, since it uses less digits than its factorization.

704720520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 704720520 is about 26546.5726601383. The cubic root of 704720520 is about 889.8954217904.

Adding to 704720520 its reverse (25027407), we get a palindrome (729747927).

The spelling of 704720520 in words is "seven hundred four million, seven hundred twenty thousand, five hundred twenty".