724740 has 48 divisors (see below), whose sum is σ = 2080512. Its totient is φ = 188416.

The previous prime is 724733. The next prime is 724747. The reversal of 724740 is 47427.

It is an interprime number because it is at equal distance from previous prime (724733) and next prime (724747).

It is a self number, because there is not a number n which added to its sum of digits gives 724740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2692 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (43344).

2⁷²⁴⁷⁴⁰ 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 724740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040256).

724740 is an abundant number, since it is smaller than the sum of its proper divisors (1355772).

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

724740 is a wasteful number, since it uses less digits than its factorization.

724740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 724740 is about 851.3166273485. The cubic root of 724740 is about 89.8243487660.

The spelling of 724740 in words is "seven hundred twenty-four thousand, seven hundred forty", and thus it is an iban number.