723948638 has 48 divisors (see below), whose sum is σ = 1342401984. Its totient is φ = 290949120.

The previous prime is 723948593. The next prime is 723948647. The reversal of 723948638 is 836849327.

723948638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 587483 + ... + 588713.

It is an arithmetic number, because the mean of its divisors is an integer number (27966708).

Almost surely, 2^723948638 is an apocalyptic number.

723948638 is a deficient number, since it is larger than the sum of its proper divisors (618453346).

723948638 is a wasteful number, since it uses less digits than its factorization.

723948638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617 (or 1610 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 723948638 is about 26906.2936503711. The cubic root of 723948638 is about 897.9164303029.

The spelling of 723948638 in words is "seven hundred twenty-three million, nine hundred forty-eight thousand, six hundred thirty-eight".