723109640 has 32 divisors (see below), whose sum is σ = 1774906560. Its totient is φ = 262948800.

The previous prime is 723109633. The next prime is 723109649. The reversal of 723109640 is 46901327.

It is a junction number, because it is equal to n+sod(n) for n = 723109597 and 723109606.

It is not an unprimeable number, because it can be changed into a prime (723109649) 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, 821276 + ... + 822155.

It is an arithmetic number, because the mean of its divisors is an integer number (55465830).

Almost surely, 2^723109640 is an apocalyptic number.

It is an amenable number.

723109640 is an abundant number, since it is smaller than the sum of its proper divisors (1051796920).

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

723109640 is a wasteful number, since it uses less digits than its factorization.

723109640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643453 (or 1643449 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 723109640 is about 26890.6980199473. The cubic root of 723109640 is about 897.5694253447.

The spelling of 723109640 in words is "seven hundred twenty-three million, one hundred nine thousand, six hundred forty".