726436426 has 4 divisors (see below), whose sum is σ = 1089654642. Its totient is φ = 363218212.

The previous prime is 726436421. The next prime is 726436427. The reversal of 726436426 is 624634627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624634627 = 53 ⋅11785559.

It can be written as a sum of positive squares in only one way, i.e., 640039401 + 86397025 = 25299^2 + 9295^2 .

It is not an unprimeable number, because it can be changed into a prime (726436421) 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 as a sum of consecutive naturals, namely, 181609105 + ... + 181609108.

Almost surely, 2^726436426 is an apocalyptic number.

726436426 is a deficient number, since it is larger than the sum of its proper divisors (363218216).

726436426 is a wasteful number, since it uses less digits than its factorization.

726436426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363218215.

The product of its digits is 290304, while the sum is 40.

The square root of 726436426 is about 26952.4845978993. The cubic root of 726436426 is about 898.9437922330.

The spelling of 726436426 in words is "seven hundred twenty-six million, four hundred thirty-six thousand, four hundred twenty-six".