7806728198 has 16 divisors (see below), whose sum is σ = 12150577824. Its totient is φ = 3758711040.

The previous prime is 7806728191. The next prime is 7806728221. The reversal of 7806728198 is 8918276087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7806728191) 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 7 ways as a sum of consecutive naturals, for example, 536618 + ... + 550973.

It is an arithmetic number, because the mean of its divisors is an integer number (759411114).

Almost surely, 2^7806728198 is an apocalyptic number.

7806728198 is a deficient number, since it is larger than the sum of its proper divisors (4343849626).

7806728198 is a wasteful number, since it uses less digits than its factorization.

7806728198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087727.

The product of its (nonzero) digits is 2709504, while the sum is 56.

The square root of 7806728198 is about 88355.6913729953. The cubic root of 7806728198 is about 1983.7625457976.

The spelling of 7806728198 in words is "seven billion, eight hundred six million, seven hundred twenty-eight thousand, one hundred ninety-eight".