726420554 has 8 divisors (see below), whose sum is σ = 1089777540. Its totient is φ = 363161376.

The previous prime is 726420553. The next prime is 726420571. The reversal of 726420554 is 455024627.

It can be written as a sum of positive squares in 2 ways, for example, as 725063329 + 1357225 = 26927^2 + 1165^2 .

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

It is not an unprimeable number, because it can be changed into a prime (726420553) 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 in 3 ways as a sum of consecutive naturals, for example, 1619 + ... + 38150.

Almost surely, 2^726420554 is an apocalyptic number.

726420554 is a deficient number, since it is larger than the sum of its proper divisors (363356986).

726420554 is a wasteful number, since it uses less digits than its factorization.

726420554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48904.

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 726420554 is about 26952.1901521936. The cubic root of 726420554 is about 898.9372451403.

The spelling of 726420554 in words is "seven hundred twenty-six million, four hundred twenty thousand, five hundred fifty-four".