724320660 has 192 divisors, whose sum is σ = 2461132800. Its totient is φ = 155478528.

The previous prime is 724320659. The next prime is 724320689. The reversal of 724320660 is 66023427.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1108894 + ... + 1109546.

It is an arithmetic number, because the mean of its divisors is an integer number (12818400).

Almost surely, 2^724320660 is an apocalyptic number.

724320660 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 724320660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230566400).

724320660 is an abundant number, since it is smaller than the sum of its proper divisors (1736812140).

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

724320660 is a wasteful number, since it uses less digits than its factorization.

724320660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 724320660 is about 26913.2060520481. The cubic root of 724320660 is about 898.0702107626.

The spelling of 724320660 in words is "seven hundred twenty-four million, three hundred twenty thousand, six hundred sixty".