723730442 has 8 divisors (see below), whose sum is σ = 1112073732. Its totient is φ = 353039200.

The previous prime is 723730417. The next prime is 723730451. The reversal of 723730442 is 244037327.

It can be written as a sum of positive squares in 2 ways, for example, as 721513321 + 2217121 = 26861^2 + 1489^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 723730399 and 723730408.

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, 4412909 + ... + 4413072.

Almost surely, 2^723730442 is an apocalyptic number.

723730442 is a deficient number, since it is larger than the sum of its proper divisors (388343290).

723730442 is a wasteful number, since it uses less digits than its factorization.

723730442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8826024.

The product of its (nonzero) digits is 28224, while the sum is 32.

The square root of 723730442 is about 26902.2386057369. The cubic root of 723730442 is about 897.8262114440.

Adding to 723730442 its reverse (244037327), we get a palindrome (967767769).

The spelling of 723730442 in words is "seven hundred twenty-three million, seven hundred thirty thousand, four hundred forty-two".