28123806223826 has 32 divisors (see below), whose sum is σ = 44781604920000. Its totient is φ = 13200860639232.

The previous prime is 28123806223759. The next prime is 28123806223837. The reversal of 28123806223826 is 62832260832182.

It is a super-2 number, since 2×28123806223826² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45782945 + ... + 46393163.

It is an arithmetic number, because the mean of its divisors is an integer number (1399425153750).

Almost surely, 2^{28123806223826} is an apocalyptic number.

28123806223826 is a deficient number, since it is larger than the sum of its proper divisors (16657798696174).

28123806223826 is a wasteful number, since it uses less digits than its factorization.

28123806223826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613706.

The product of its (nonzero) digits is 5308416, while the sum is 53.

The spelling of 28123806223826 in words is "twenty-eight trillion, one hundred twenty-three billion, eight hundred six million, two hundred twenty-three thousand, eight hundred twenty-six".