28238481745 has 8 divisors (see below), whose sum is σ = 34363448640. Its totient is φ = 22272605040.

The previous prime is 28238481727. The next prime is 28238481757. The reversal of 28238481745 is 54718483282.

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

It is not a de Polignac number, because 28238481745 - 2²¹ = 28236384593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28238481692 and 28238481701.

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, 39772155 + ... + 39772864.

It is an arithmetic number, because the mean of its divisors is an integer number (4295431080).

Almost surely, 2^28238481745 is an apocalyptic number.

It is an amenable number.

28238481745 is a deficient number, since it is larger than the sum of its proper divisors (6124966895).

28238481745 is an equidigital number, since it uses as much as digits as its factorization.

28238481745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79545095.

The product of its digits is 3440640, while the sum is 52.

The spelling of 28238481745 in words is "twenty-eight billion, two hundred thirty-eight million, four hundred eighty-one thousand, seven hundred forty-five".