28475434793 has 18 divisors (see below), whose sum is σ = 31087446714. Its totient is φ = 26069626752.

The previous prime is 28475434787. The next prime is 28475434807. The reversal of 28475434793 is 39743457482.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 27626761369 + 848673424 = 166213^2 + 29132^2 .

It is not a de Polignac number, because 28475434793 - 2¹⁴ = 28475418409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28475430793) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 25676123 + ... + 25677231.

It is an arithmetic number, because the mean of its divisors is an integer number (1727080373).

Almost surely, 2^28475434793 is an apocalyptic number.

It is an amenable number.

28475434793 is a deficient number, since it is larger than the sum of its proper divisors (2612011921).

28475434793 is an equidigital number, since it uses as much as digits as its factorization.

28475434793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381 (or 1259 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 56.

The spelling of 28475434793 in words is "twenty-eight billion, four hundred seventy-five million, four hundred thirty-four thousand, seven hundred ninety-three".