723408842 has 16 divisors (see below), whose sum is σ = 1175345640. Its totient is φ = 331948992.

The previous prime is 723408809. The next prime is 723408859. The reversal of 723408842 is 248804327.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 410508121 + 312900721 = 20261^2 + 17689^2 .

It is a junction number, because it is equal to n+sod(n) for n = 723408796 and 723408805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75917 + ... + 84912.

Almost surely, 2^723408842 is an apocalyptic number.

723408842 is a deficient number, since it is larger than the sum of its proper divisors (451936798).

723408842 is a wasteful number, since it uses less digits than its factorization.

723408842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161017.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 723408842 is about 26896.2607438283. The cubic root of 723408842 is about 897.6932044236.

The spelling of 723408842 in words is "seven hundred twenty-three million, four hundred eight thousand, eight hundred forty-two".