726221878 has 32 divisors (see below), whose sum is σ = 1175731200. Its totient is φ = 335197824.

The previous prime is 726221851. The next prime is 726221879. The reversal of 726221878 is 878122627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726221879) 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 15 ways as a sum of consecutive naturals, for example, 447753 + ... + 449371.

It is an arithmetic number, because the mean of its divisors is an integer number (36741600).

Almost surely, 2^726221878 is an apocalyptic number.

726221878 is a deficient number, since it is larger than the sum of its proper divisors (449509322).

726221878 is a wasteful number, since it uses less digits than its factorization.

726221878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884.

The product of its digits is 150528, while the sum is 43.

The square root of 726221878 is about 26948.5041885445. The cubic root of 726221878 is about 898.8552845645.

The spelling of 726221878 in words is "seven hundred twenty-six million, two hundred twenty-one thousand, eight hundred seventy-eight".