726405547 has 12 divisors (see below), whose sum is σ = 872262336. Its totient is φ = 602547120.

The previous prime is 726405541. The next prime is 726405551. The reversal of 726405547 is 745504627.

It is not a de Polignac number, because 726405547 - 2⁷ = 726405419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726405541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237588 + ... + 240625.

It is an arithmetic number, because the mean of its divisors is an integer number (72688528).

Almost surely, 2^726405547 is an apocalyptic number.

726405547 is a deficient number, since it is larger than the sum of its proper divisors (145856789).

726405547 is a wasteful number, since it uses less digits than its factorization.

726405547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478258 (or 478251 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 40.

The square root of 726405547 is about 26951.9117503750. The cubic root of 726405547 is about 898.9310547666.

It can be divided in two parts, 72640 and 5547, that added together give a palindrome (78187).

The spelling of 726405547 in words is "seven hundred twenty-six million, four hundred five thousand, five hundred forty-seven".