28274847487731 has 12 divisors (see below), whose sum is σ = 43983096092208. Its totient is φ = 17399906146224.

The previous prime is 28274847487717. The next prime is 28274847487739. The reversal of 28274847487731 is 13778474847282.

28274847487731 is a `hidden beast` number, since 2 + 8 + 2 + 7 + 4 + 8 + 474 + 87 + 73 + 1 = 666.

It is not a de Polignac number, because 28274847487731 - 2¹¹ = 28274847485683 is a prime.

It is a super-2 number, since 2×28274847487731² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28274847487731.

It is not an unprimeable number, because it can be changed into a prime (28274847487739) 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, 120832681455 + ... + 120832681688.

It is an arithmetic number, because the mean of its divisors is an integer number (3665258007684).

Almost surely, 2^{28274847487731} is an apocalyptic number.

28274847487731 is a deficient number, since it is larger than the sum of its proper divisors (15708248604477).

28274847487731 is a wasteful number, since it uses less digits than its factorization.

28274847487731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241665363162 (or 241665363159 counting only the distinct ones).

The product of its digits is 944111616, while the sum is 72.

The spelling of 28274847487731 in words is "twenty-eight trillion, two hundred seventy-four billion, eight hundred forty-seven million, four hundred eighty-seven thousand, seven hundred thirty-one".