726557828 has 6 divisors (see below), whose sum is σ = 1271476206. Its totient is φ = 363278912.

The previous prime is 726557827. The next prime is 726557837. The reversal of 726557828 is 828755627.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 475588864 + 250968964 = 21808^2 + 15842^2 .

It is not an unprimeable number, because it can be changed into a prime (726557827) 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, 90819725 + ... + 90819732.

It is an arithmetic number, because the mean of its divisors is an integer number (211912701).

Almost surely, 2^726557828 is an apocalyptic number.

It is an amenable number.

726557828 is a deficient number, since it is larger than the sum of its proper divisors (544918378).

726557828 is a wasteful number, since it uses less digits than its factorization.

726557828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181639461 (or 181639459 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 50.

The square root of 726557828 is about 26954.7366523956. The cubic root of 726557828 is about 898.9938665829.

The spelling of 726557828 in words is "seven hundred twenty-six million, five hundred fifty-seven thousand, eight hundred twenty-eight".