28624226818 has 24 divisors (see below), whose sum is σ = 47287413180. Its totient is φ = 12985394400.

The previous prime is 28624226797. The next prime is 28624226857. The reversal of 28624226818 is 81862242682.

It can be written as a sum of positive squares in 2 ways, for example, as 28114234929 + 509991889 = 167673^2 + 22583^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6988 + ... + 239368.

Almost surely, 2^28624226818 is an apocalyptic number.

28624226818 is a deficient number, since it is larger than the sum of its proper divisors (18663186362).

28624226818 is a wasteful number, since it uses less digits than its factorization.

28624226818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232914 (or 232903 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 49.

The spelling of 28624226818 in words is "twenty-eight billion, six hundred twenty-four million, two hundred twenty-six thousand, eight hundred eighteen".