28429669320 has 128 divisors (see below), whose sum is σ = 91927059840. Its totient is φ = 6992179200.

The previous prime is 28429669297. The next prime is 28429669327. The reversal of 28429669320 is 2396692482.

It is a Cunningham number, because it is equal to 168611²-1.

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 (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2016295 + ... + 2030345.

It is an arithmetic number, because the mean of its divisors is an integer number (718180155).

Almost surely, 2^28429669320 is an apocalyptic number.

28429669320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28429669320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45963529920).

28429669320 is an abundant number, since it is smaller than the sum of its proper divisors (63497390520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28429669320 is a wasteful number, since it uses less digits than its factorization.

28429669320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15375 (or 15371 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 28429669320 in words is "twenty-eight billion, four hundred twenty-nine million, six hundred sixty-nine thousand, three hundred twenty".