721735412 has 24 divisors (see below), whose sum is σ = 1316904960. Its totient is φ = 345673440.

The previous prime is 721735403. The next prime is 721735447. The reversal of 721735412 is 214537127.

721735412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9764 + ... + 39227.

It is an arithmetic number, because the mean of its divisors is an integer number (54871040).

Almost surely, 2^721735412 is an apocalyptic number.

It is an amenable number.

721735412 is a deficient number, since it is larger than the sum of its proper divisors (595169548).

721735412 is a wasteful number, since it uses less digits than its factorization.

721735412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49151 (or 49149 counting only the distinct ones).

The product of its digits is 11760, while the sum is 32.

The square root of 721735412 is about 26865.1337610666. The cubic root of 721735412 is about 897.0004718646. Note that the first 3 decimals are identical.

The spelling of 721735412 in words is "seven hundred twenty-one million, seven hundred thirty-five thousand, four hundred twelve".