720684404 has 48 divisors (see below), whose sum is σ = 1426016256. Its totient is φ = 315727200.

The previous prime is 720684403. The next prime is 720684413. The reversal of 720684404 is 404486027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720684403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385079 + ... + 386945.

It is an arithmetic number, because the mean of its divisors is an integer number (29708672).

Almost surely, 2^720684404 is an apocalyptic number.

It is an amenable number.

720684404 is a deficient number, since it is larger than the sum of its proper divisors (705331852).

720684404 is a wasteful number, since it uses less digits than its factorization.

720684404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196 (or 2194 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 720684404 is about 26845.5658163504. The cubic root of 720684404 is about 896.5648493140.

The spelling of 720684404 in words is "seven hundred twenty million, six hundred eighty-four thousand, four hundred four".