28126584838 has 24 divisors (see below), whose sum is σ = 46485899640. Its totient is φ = 12658128000.

The previous prime is 28126584833. The next prime is 28126584841. The reversal of 28126584838 is 83848562182.

It is a super-2 number, since 2×28126584838² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28126584833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161758 + ... + 287086.

It is an arithmetic number, because the mean of its divisors is an integer number (1936912485).

Almost surely, 2^28126584838 is an apocalyptic number.

28126584838 is a deficient number, since it is larger than the sum of its proper divisors (18359314802).

28126584838 is a wasteful number, since it uses less digits than its factorization.

28126584838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125544 (or 125443 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 55.

The spelling of 28126584838 in words is "twenty-eight billion, one hundred twenty-six million, five hundred eighty-four thousand, eight hundred thirty-eight".