724220 has 36 divisors (see below), whose sum is σ = 1771560. Its totient is φ = 247968.

The previous prime is 724219. The next prime is 724259. The reversal of 724220 is 22427.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 724220.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 611 + ... + 1349.

It is an arithmetic number, because the mean of its divisors is an integer number (49210).

2⁷²⁴²²⁰ is an apocalyptic number.

724220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 724220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885780).

724220 is an abundant number, since it is smaller than the sum of its proper divisors (1047340).

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

724220 is a wasteful number, since it uses less digits than its factorization.

724220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 724220 is about 851.0111632640. The cubic root of 724220 is about 89.8028606751.

Adding to 724220 its reverse (22427), we get a palindrome (746647).

The spelling of 724220 in words is "seven hundred twenty-four thousand, two hundred twenty", and thus it is an iban number.