28925971317 has 28 divisors (see below), whose sum is σ = 45651724480. Its totient is φ = 18269025768.

The previous prime is 28925971267. The next prime is 28925971331. The reversal of 28925971317 is 71317952982.

It is a happy number.

28925971317 is a `hidden beast` number, since 2 + 8 + 9 + 259 + 71 + 317 = 666.

It is not a de Polignac number, because 28925971317 - 2¹¹ = 28925969269 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 (28925971517) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1030333 + ... + 1058034.

Almost surely, 2^28925971317 is an apocalyptic number.

28925971317 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28925971317 is a deficient number, since it is larger than the sum of its proper divisors (16725753163).

28925971317 is an equidigital number, since it uses as much as digits as its factorization.

28925971317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088404 (or 2088389 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The spelling of 28925971317 in words is "twenty-eight billion, nine hundred twenty-five million, nine hundred seventy-one thousand, three hundred seventeen".