723715538 has 16 divisors (see below), whose sum is σ = 1336090560. Its totient is φ = 286304976.

The previous prime is 723715537. The next prime is 723715547. The reversal of 723715538 is 835517327.

It is a junction number, because it is equal to n+sod(n) for n = 723715495 and 723715504.

It is not an unprimeable number, because it can be changed into a prime (723715537) 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, 1988048 + ... + 1988411.

It is an arithmetic number, because the mean of its divisors is an integer number (83505660).

Almost surely, 2^723715538 is an apocalyptic number.

723715538 is a deficient number, since it is larger than the sum of its proper divisors (612375022).

723715538 is a wasteful number, since it uses less digits than its factorization.

723715538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3976481.

The product of its digits is 176400, while the sum is 41.

The square root of 723715538 is about 26901.9616013405. The cubic root of 723715538 is about 897.8200483327.

It can be divided in two parts, 72 and 3715538, that multiplied together give a square (267518736 = 16356²).

The spelling of 723715538 in words is "seven hundred twenty-three million, seven hundred fifteen thousand, five hundred thirty-eight".