723406738 has 8 divisors (see below), whose sum is σ = 1085248332. Its totient is φ = 361657296.

The previous prime is 723406727. The next prime is 723406753. The reversal of 723406738 is 837604327.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 653466969 + 69939769 = 25563^2 + 8363^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 723406738.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2056 + ... + 38092.

Almost surely, 2^723406738 is an apocalyptic number.

723406738 is a deficient number, since it is larger than the sum of its proper divisors (361841594).

723406738 is a wasteful number, since it uses less digits than its factorization.

723406738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46076.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 723406738 is about 26896.2216305562. The cubic root of 723406738 is about 897.6923341235.

The spelling of 723406738 in words is "seven hundred twenty-three million, four hundred six thousand, seven hundred thirty-eight".