721484306 has 16 divisors (see below), whose sum is σ = 1105925184. Its totient is φ = 352927344.

The previous prime is 721484303. The next prime is 721484347. The reversal of 721484306 is 603484127.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (721484303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4001 + ... + 38196.

It is an arithmetic number, because the mean of its divisors is an integer number (69120324).

Almost surely, 2^721484306 is an apocalyptic number.

721484306 is a deficient number, since it is larger than the sum of its proper divisors (384440878).

721484306 is a wasteful number, since it uses less digits than its factorization.

721484306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42385.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 721484306 is about 26860.4598992646. The cubic root of 721484306 is about 896.8964317395.

The spelling of 721484306 in words is "seven hundred twenty-one million, four hundred eighty-four thousand, three hundred six".