28206003138 has 16 divisors (see below), whose sum is σ = 56592240096. Its totient is φ = 9371962080.

The previous prime is 28206003097. The next prime is 28206003143. The reversal of 28206003138 is 83130060282.

It is a super-2 number, since 2×28206003138² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28206003099 and 28206003108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7507708 + ... + 7511463.

It is an arithmetic number, because the mean of its divisors is an integer number (3537015006).

Almost surely, 2^28206003138 is an apocalyptic number.

28206003138 is an abundant number, since it is smaller than the sum of its proper divisors (28386236958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28206003138 is a wasteful number, since it uses less digits than its factorization.

28206003138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15019489.

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 28206003138 in words is "twenty-eight billion, two hundred six million, three thousand, one hundred thirty-eight".