723540720 has 160 divisors (see below), whose sum is σ = 2651973120. Its totient is φ = 159667200.

The previous prime is 723540667. The next prime is 723540721. The reversal of 723540720 is 27045327.

It is a super-2 number, since 2×723540720² = 1047022346996236800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723540721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41295 + ... + 56145.

It is an arithmetic number, because the mean of its divisors is an integer number (16574832).

Almost surely, 2^723540720 is an apocalyptic number.

723540720 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 723540720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325986560).

723540720 is an abundant number, since it is smaller than the sum of its proper divisors (1928432400).

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

723540720 is a wasteful number, since it uses less digits than its factorization.

723540720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14903 (or 14897 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 723540720 is about 26898.7122368339. The cubic root of 723540720 is about 897.7477511678.

The spelling of 723540720 in words is "seven hundred twenty-three million, five hundred forty thousand, seven hundred twenty".