724635740 has 12 divisors (see below), whose sum is σ = 1521735096. Its totient is φ = 289854288.

The previous prime is 724635719. The next prime is 724635781. The reversal of 724635740 is 47536427.

It is a junction number, because it is equal to n+sod(n) for n = 724635694 and 724635703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18115874 + ... + 18115913.

It is an arithmetic number, because the mean of its divisors is an integer number (126811258).

Almost surely, 2^724635740 is an apocalyptic number.

It is an amenable number.

724635740 is an abundant number, since it is smaller than the sum of its proper divisors (797099356).

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

724635740 is a wasteful number, since it uses less digits than its factorization.

724635740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36231796 (or 36231794 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 38.

The square root of 724635740 is about 26919.0590474481. The cubic root of 724635740 is about 898.2004122777.

The spelling of 724635740 in words is "seven hundred twenty-four million, six hundred thirty-five thousand, seven hundred forty".