723456140 has 24 divisors (see below), whose sum is σ = 1657372752. Its totient is φ = 263074880.

The previous prime is 723456121. The next prime is 723456143. The reversal of 723456140 is 41654327.

It is a junction number, because it is equal to n+sod(n) for n = 723456097 and 723456106.

It is not an unprimeable number, because it can be changed into a prime (723456143) 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 7 ways as a sum of consecutive naturals, for example, 1643999 + ... + 1644438.

It is an arithmetic number, because the mean of its divisors is an integer number (69057198).

Almost surely, 2^723456140 is an apocalyptic number.

It is an amenable number.

723456140 is an abundant number, since it is smaller than the sum of its proper divisors (933916612).

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

723456140 is a wasteful number, since it uses less digits than its factorization.

723456140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288457 (or 3288455 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 723456140 is about 26897.1399966614. The cubic root of 723456140 is about 897.7127683573.

The spelling of 723456140 in words is "seven hundred twenty-three million, four hundred fifty-six thousand, one hundred forty".