8128400726 has 16 divisors (see below), whose sum is σ = 12265077888. Its totient is φ = 4040112000.

The previous prime is 8128400719. The next prime is 8128400729. The reversal of 8128400726 is 6270048218.

It is a self number, because there is not a number n which added to its sum of digits gives 8128400726.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8128400729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217691 + ... + 252281.

It is an arithmetic number, because the mean of its divisors is an integer number (766567368).

Almost surely, 2^8128400726 is an apocalyptic number.

8128400726 is a deficient number, since it is larger than the sum of its proper divisors (4136677162).

8128400726 is a wasteful number, since it uses less digits than its factorization.

8128400726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35287.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 8128400726 is about 90157.6437469392. The cubic root of 8128400726 is about 2010.6433198976.

The spelling of 8128400726 in words is "eight billion, one hundred twenty-eight million, four hundred thousand, seven hundred twenty-six".