704991728 has 80 divisors (see below), whose sum is σ = 1604659200. Its totient is φ = 293787648.

The previous prime is 704991719. The next prime is 704991773. The reversal of 704991728 is 827199407.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1047200 + ... + 1047872.

It is an arithmetic number, because the mean of its divisors is an integer number (20058240).

Almost surely, 2^704991728 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 704991728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (802329600).

704991728 is an abundant number, since it is smaller than the sum of its proper divisors (899667472).

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

704991728 is a wasteful number, since it uses less digits than its factorization.

704991728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 704991728 is about 26551.6803234748. The cubic root of 704991728 is about 890.0095643462.

It can be divided in two parts, 70499 and 1728, that added together give a palindrome (72227).

The spelling of 704991728 in words is "seven hundred four million, nine hundred ninety-one thousand, seven hundred twenty-eight".