538638826 has 16 divisors (see below), whose sum is σ = 909842688. Its totient is φ = 236937600.

The previous prime is 538638823. The next prime is 538638833. The reversal of 538638826 is 628836835.

538638826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 538638826.

It is not an unprimeable number, because it can be changed into a prime (538638823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394215 + ... + 395578.

It is an arithmetic number, because the mean of its divisors is an integer number (56865168).

Almost surely, 2^538638826 is an apocalyptic number.

538638826 is a deficient number, since it is larger than the sum of its proper divisors (371203862).

538638826 is a wasteful number, since it uses less digits than its factorization.

538638826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789837.

The product of its digits is 1658880, while the sum is 49.

The square root of 538638826 is about 23208.5937962643. The cubic root of 538638826 is about 813.6404880303.

The spelling of 538638826 in words is "five hundred thirty-eight million, six hundred thirty-eight thousand, eight hundred twenty-six".