28339671425 has 12 divisors (see below), whose sum is σ = 37844361660. Its totient is φ = 20927757120.

The previous prime is 28339671389. The next prime is 28339671427. The reversal of 28339671425 is 52417693382.

It can be written as a sum of positive squares in 6 ways, for example, as 11566572304 + 16773099121 = 107548^2 + 129511^2 .

It is not a de Polignac number, because 28339671425 - 2³² = 24044704129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28339671427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43599170 + ... + 43599819.

It is an arithmetic number, because the mean of its divisors is an integer number (3153696805).

Almost surely, 2^28339671425 is an apocalyptic number.

28339671425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28339671425 is a deficient number, since it is larger than the sum of its proper divisors (9504690235).

28339671425 is a wasteful number, since it uses less digits than its factorization.

28339671425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87199012 (or 87199007 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 50.

The spelling of 28339671425 in words is "twenty-eight billion, three hundred thirty-nine million, six hundred seventy-one thousand, four hundred twenty-five".