724816 has 20 divisors (see below), whose sum is σ = 1422900. Its totient is φ = 357632.

The previous prime is 724813. The next prime is 724837. The reversal of 724816 is 618427.

724816 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 2 ways, for example, as 364816 + 360000 = 604^2 + 600^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1170 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (71145).

2⁷²⁴⁸¹⁶ is an apocalyptic number.

It is an amenable number.

724816 is a deficient number, since it is larger than the sum of its proper divisors (698084).

724816 is a wasteful number, since it uses less digits than its factorization.

724816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606 (or 600 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 724816 is about 851.3612629196. The cubic root of 724816 is about 89.8274884721.

It can be divided in two parts, 724 and 816, that added together give a triangular number (1540 = T₅₅).

The spelling of 724816 in words is "seven hundred twenty-four thousand, eight hundred sixteen".