28304386429 has 24 divisors (see below), whose sum is σ = 32094193824. Its totient is φ = 24924636000.

The previous prime is 28304386403. The next prime is 28304386447. The reversal of 28304386429 is 92468340382.

It is a de Polignac number, because none of the positive numbers 2^k-28304386429 is a prime.

It is a super-2 number, since 2×28304386429² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28304386499) 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, 1002354 + ... + 1030204.

It is an arithmetic number, because the mean of its divisors is an integer number (1337258076).

Almost surely, 2^28304386429 is an apocalyptic number.

It is an amenable number.

28304386429 is a deficient number, since it is larger than the sum of its proper divisors (3789807395).

28304386429 is a wasteful number, since it uses less digits than its factorization.

28304386429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28137 (or 28126 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 49.

The spelling of 28304386429 in words is "twenty-eight billion, three hundred four million, three hundred eighty-six thousand, four hundred twenty-nine".