724343040 has 144 divisors (see below), whose sum is σ = 2570534400. Its totient is φ = 193148928.

The previous prime is 724343033. The next prime is 724343051. The reversal of 724343040 is 40343427.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 724342995 and 724343013.

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 15 ways as a sum of consecutive naturals, for example, 24081 + ... + 45039.

Almost surely, 2^724343040 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 724343040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1285267200).

724343040 is an abundant number, since it is smaller than the sum of its proper divisors (1846191360).

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

724343040 is a wasteful number, since it uses less digits than its factorization.

724343040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20989 (or 20969 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 27.

The square root of 724343040 is about 26913.6218298467. The cubic root of 724343040 is about 898.0794601671.

Adding to 724343040 its reverse (40343427), we get a palindrome (764686467).

The spelling of 724343040 in words is "seven hundred twenty-four million, three hundred forty-three thousand, forty".