724736 has 36 divisors (see below), whose sum is σ = 1533000. Its totient is φ = 340992.

The previous prime is 724733. The next prime is 724747. The reversal of 724736 is 637427.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 724699 and 724708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4790 + ... + 4938.

2⁷²⁴⁷³⁶ is an apocalyptic number.

724736 is a gapful number since it is divisible by the number (76) 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 724736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766500).

724736 is an abundant number, since it is smaller than the sum of its proper divisors (808264).

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

724736 is a wasteful number, since it uses less digits than its factorization.

724736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 170 counting only the distinct ones).

The product of its digits is 7056, while the sum is 29.

The square root of 724736 is about 851.3142780431. The cubic root of 724736 is about 89.8241835122.

The spelling of 724736 in words is "seven hundred twenty-four thousand, seven hundred thirty-six".