28224737605 has 4 divisors (see below), whose sum is σ = 33869685132. Its totient is φ = 22579790080.

The previous prime is 28224737573. The next prime is 28224737627. The reversal of 28224737605 is 50673742282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50673742282 = 2 ⋅25336871141.

It can be written as a sum of positive squares in 2 ways, for example, as 3199712356 + 25025025249 = 56566^2 + 158193^2 .

It is not a de Polignac number, because 28224737605 - 2⁵ = 28224737573 is a prime.

It is a super-2 number, since 2×28224737605² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2822473756 + ... + 2822473765.

It is an arithmetic number, because the mean of its divisors is an integer number (8467421283).

Almost surely, 2^28224737605 is an apocalyptic number.

It is an amenable number.

28224737605 is a deficient number, since it is larger than the sum of its proper divisors (5644947527).

28224737605 is an equidigital number, since it uses as much as digits as its factorization.

28224737605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644947526.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 28224737605 in words is "twenty-eight billion, two hundred twenty-four million, seven hundred thirty-seven thousand, six hundred five".