28216424138 has 16 divisors (see below), whose sum is σ = 48373174080. Its totient is φ = 12092212896.

The previous prime is 28216424129. The next prime is 28216424149. The reversal of 28216424138 is 83142461282.

It is a happy number.

It is a super-2 number, since 2×28216424138² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28216424095 and 28216424104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557870 + ... + 606342.

It is an arithmetic number, because the mean of its divisors is an integer number (3023323380).

Almost surely, 2^28216424138 is an apocalyptic number.

28216424138 is a deficient number, since it is larger than the sum of its proper divisors (20156749942).

28216424138 is a wasteful number, since it uses less digits than its factorization.

28216424138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90061.

The product of its digits is 147456, while the sum is 41.

The spelling of 28216424138 in words is "twenty-eight billion, two hundred sixteen million, four hundred twenty-four thousand, one hundred thirty-eight".