724120 has 32 divisors (see below), whose sum is σ = 1671120. Its totient is φ = 282240.

The previous prime is 724117. The next prime is 724121. The reversal of 724120 is 21427.

It is a junction number, because it is equal to n+sod(n) for n = 724094 and 724103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724121) 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, 1510 + ... + 1930.

2⁷²⁴¹²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 724120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835560).

724120 is an abundant number, since it is smaller than the sum of its proper divisors (947000).

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

724120 is a wasteful number, since it uses less digits than its factorization.

724120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 724120 is about 850.9524075999. The cubic root of 724120 is about 89.7987271708.

Adding to 724120 its reverse (21427), we get a palindrome (745547).

The spelling of 724120 in words is "seven hundred twenty-four thousand, one hundred twenty", and thus it is an iban number.