28429669325 has 24 divisors (see below), whose sum is σ = 36968039400. Its totient is φ = 21658613760.

The previous prime is 28429669297. The next prime is 28429669327. The reversal of 28429669325 is 52396692482.

It can be written as a sum of positive squares in 12 ways, for example, as 2229067369 + 26200601956 = 47213^2 + 161866^2 .

It is not a de Polignac number, because 28429669325 - 2²² = 28425475021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28429669327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215660 + ... + 321509.

It is an arithmetic number, because the mean of its divisors is an integer number (1540334975).

Almost surely, 2^28429669325 is an apocalyptic number.

28429669325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28429669325 is a deficient number, since it is larger than the sum of its proper divisors (8538370075).

28429669325 is a wasteful number, since it uses less digits than its factorization.

28429669325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537281 (or 537276 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 56.

The spelling of 28429669325 in words is "twenty-eight billion, four hundred twenty-nine million, six hundred sixty-nine thousand, three hundred twenty-five".