28427934973 has 6 divisors (see below), whose sum is σ = 30198533306. Its totient is φ = 26755703232.

The previous prime is 28427934923. The next prime is 28427934989. The reversal of 28427934973 is 37943972482.

It can be written as a sum of positive squares in 3 ways, for example, as 9662496804 + 18765438169 = 98298^2 + 136987^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28427934973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28427934923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49182990 + ... + 49183567.

Almost surely, 2^28427934973 is an apocalyptic number.

It is an amenable number.

28427934973 is a deficient number, since it is larger than the sum of its proper divisors (1770598333).

28427934973 is an equidigital number, since it uses as much as digits as its factorization.

28427934973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98366591 (or 98366574 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 58.

The spelling of 28427934973 in words is "twenty-eight billion, four hundred twenty-seven million, nine hundred thirty-four thousand, nine hundred seventy-three".