28078275629 has 32 divisors (see below), whose sum is σ = 29796076800. Its totient is φ = 26422950400.

The previous prime is 28078275619. The next prime is 28078275679. The reversal of 28078275629 is 92657287082.

It is a cyclic number.

It is not a de Polignac number, because 28078275629 - 2⁴ = 28078275613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28078275619) 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, 67012382 + ... + 67012800.

It is an arithmetic number, because the mean of its divisors is an integer number (931127400).

Almost surely, 2^28078275629 is an apocalyptic number.

28078275629 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28078275629 is a deficient number, since it is larger than the sum of its proper divisors (1717801171).

28078275629 is a wasteful number, since it uses less digits than its factorization.

28078275629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 28078275629 in words is "twenty-eight billion, seventy-eight million, two hundred seventy-five thousand, six hundred twenty-nine".