28149381329 has 8 divisors (see below), whose sum is σ = 29675670528. Its totient is φ = 26661732480.

The previous prime is 28149381319. The next prime is 28149381349. The reversal of 28149381329 is 92318394182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28149381329 - 2⁴ = 28149381313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28149381319) 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 7 ways as a sum of consecutive naturals, for example, 9658592 + ... + 9661505.

It is an arithmetic number, because the mean of its divisors is an integer number (3709458816).

Almost surely, 2^28149381329 is an apocalyptic number.

It is an amenable number.

28149381329 is a deficient number, since it is larger than the sum of its proper divisors (1526289199).

28149381329 is a wasteful number, since it uses less digits than its factorization.

28149381329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19320175.

The product of its digits is 746496, while the sum is 50.

The spelling of 28149381329 in words is "twenty-eight billion, one hundred forty-nine million, three hundred eighty-one thousand, three hundred twenty-nine".