726645445 has 8 divisors (see below), whose sum is σ = 873990936. Its totient is φ = 579972096.

The previous prime is 726645421. The next prime is 726645461. The reversal of 726645445 is 544546627.

It can be written as a sum of positive squares in 4 ways, for example, as 111555844 + 615089601 = 10562^2 + 24801^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 726645445 - 2¹¹ = 726643397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165652 + ... + 169981.

It is an arithmetic number, because the mean of its divisors is an integer number (109248867).

Almost surely, 2^726645445 is an apocalyptic number.

It is an amenable number.

726645445 is a deficient number, since it is larger than the sum of its proper divisors (147345491).

726645445 is a wasteful number, since it uses less digits than its factorization.

726645445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336071.

The product of its digits is 806400, while the sum is 43.

The square root of 726645445 is about 26956.3618650589. The cubic root of 726645445 is about 899.0300022611.

The spelling of 726645445 in words is "seven hundred twenty-six million, six hundred forty-five thousand, four hundred forty-five".