723666720 has 192 divisors, whose sum is σ = 2676070656. Its totient is φ = 160911360.

The previous prime is 723666709. The next prime is 723666731. The reversal of 723666720 is 27666327.

It is an interprime number because it is at equal distance from previous prime (723666709) and next prime (723666731).

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 31 ways as a sum of consecutive naturals, for example, 121410 + ... + 127230.

It is an arithmetic number, because the mean of its divisors is an integer number (13937868).

Almost surely, 2^723666720 is an apocalyptic number.

723666720 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 723666720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1338035328).

723666720 is an abundant number, since it is smaller than the sum of its proper divisors (1952403936).

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

723666720 is a wasteful number, since it uses less digits than its factorization.

723666720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5883 (or 5875 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 39.

The square root of 723666720 is about 26901.0542544340. The cubic root of 723666720 is about 897.7998604908.

The spelling of 723666720 in words is "seven hundred twenty-three million, six hundred sixty-six thousand, seven hundred twenty".