28686212247 has 48 divisors (see below), whose sum is σ = 48651508224. Its totient is φ = 14866992000.

The previous prime is 28686212209. The next prime is 28686212279. The reversal of 28686212247 is 74221268682.

It is not a de Polignac number, because 28686212247 - 2¹⁶ = 28686146711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28686212196 and 28686212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28686213247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 676347 + ... + 717507.

It is an arithmetic number, because the mean of its divisors is an integer number (1013573088).

Almost surely, 2^28686212247 is an apocalyptic number.

28686212247 is a deficient number, since it is larger than the sum of its proper divisors (19965295977).

28686212247 is a wasteful number, since it uses less digits than its factorization.

28686212247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41620 (or 41613 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 48.

The spelling of 28686212247 in words is "twenty-eight billion, six hundred eighty-six million, two hundred twelve thousand, two hundred forty-seven".