28478451047 has 8 divisors (see below), whose sum is σ = 29175818112. Its totient is φ = 27781216000.

The previous prime is 28478451011. The next prime is 28478451059. The reversal of 28478451047 is 74015487482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28478451047 - 2¹⁶ = 28478385511 is a prime.

It is a super-2 number, since 2×28478451047² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28478450986 and 28478451004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28478451007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512783 + ... + 565599.

It is an arithmetic number, because the mean of its divisors is an integer number (3646977264).

Almost surely, 2^28478451047 is an apocalyptic number.

28478451047 is a deficient number, since it is larger than the sum of its proper divisors (697367065).

28478451047 is a wasteful number, since it uses less digits than its factorization.

28478451047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66009.

The product of its (nonzero) digits is 2007040, while the sum is 50.

The spelling of 28478451047 in words is "twenty-eight billion, four hundred seventy-eight million, four hundred fifty-one thousand, forty-seven".