723047040 has 128 divisors (see below), whose sum is σ = 2560852800. Its totient is φ = 192807936.

The previous prime is 723046997. The next prime is 723047047. The reversal of 723047040 is 40740327.

It is a tau number, because it is divible by the number of its divisors (128).

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 = 723046995 and 723047013.

It is not an unprimeable number, because it can be changed into a prime (723047047) by changing a digit.

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, 3642 + ... + 38201.

Almost surely, 2^723047040 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 723047040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280426400).

723047040 is an abundant number, since it is smaller than the sum of its proper divisors (1837805760).

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

723047040 is a wasteful number, since it uses less digits than its factorization.

723047040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41871 (or 41853 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 723047040 is about 26889.5340234821. The cubic root of 723047040 is about 897.5435235706.

Adding to 723047040 its reverse (40740327), we get a palindrome (763787367).

The spelling of 723047040 in words is "seven hundred twenty-three million, forty-seven thousand, forty".