724386649 has 12 divisors (see below), whose sum is σ = 843167028. Its totient is φ = 620524800.

The previous prime is 724386631. The next prime is 724386653. The reversal of 724386649 is 946683427.

724386649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 503329225 + 221057424 = 22435^2 + 14868^2 .

It is not a de Polignac number, because 724386649 - 2⁵ = 724386617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724386149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102469 + ... + 109309.

It is an arithmetic number, because the mean of its divisors is an integer number (70263919).

Almost surely, 2^724386649 is an apocalyptic number.

It is an amenable number.

724386649 is a deficient number, since it is larger than the sum of its proper divisors (118780379).

724386649 is a wasteful number, since it uses less digits than its factorization.

724386649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016 (or 9009 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 49.

The square root of 724386649 is about 26914.4319836031. The cubic root of 724386649 is about 898.0974827333.

The spelling of 724386649 in words is "seven hundred twenty-four million, three hundred eighty-six thousand, six hundred forty-nine".