721684060 has 24 divisors (see below), whose sum is σ = 1547784000. Its totient is φ = 282531264.

The previous prime is 721684057. The next prime is 721684063. The reversal of 721684060 is 60486127.

It is an interprime number because it is at equal distance from previous prime (721684057) and next prime (721684063).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721684063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382935 + ... + 384814.

It is an arithmetic number, because the mean of its divisors is an integer number (64491000).

Almost surely, 2^721684060 is an apocalyptic number.

It is an amenable number.

721684060 is an abundant number, since it is smaller than the sum of its proper divisors (826099940).

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

721684060 is a wasteful number, since it uses less digits than its factorization.

721684060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767805 (or 767803 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 721684060 is about 26864.1780071529. The cubic root of 721684060 is about 896.9791972811.

The spelling of 721684060 in words is "seven hundred twenty-one million, six hundred eighty-four thousand, sixty".