726420346 has 4 divisors (see below), whose sum is σ = 1089630522. Its totient is φ = 363210172.

The previous prime is 726420341. The next prime is 726420347. The reversal of 726420346 is 643024627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 365230321 + 361190025 = 19111^2 + 19005^2 .

It is not an unprimeable number, because it can be changed into a prime (726420341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181605085 + ... + 181605088.

Almost surely, 2^726420346 is an apocalyptic number.

726420346 is a deficient number, since it is larger than the sum of its proper divisors (363210176).

726420346 is a wasteful number, since it uses less digits than its factorization.

726420346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363210175.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 726420346 is about 26952.1862935087. The cubic root of 726420346 is about 898.9371593411.

The spelling of 726420346 in words is "seven hundred twenty-six million, four hundred twenty thousand, three hundred forty-six".