28013943769 has 32 divisors (see below), whose sum is σ = 33437859840. Its totient is φ = 22962139200.

The previous prime is 28013943751. The next prime is 28013943823. The reversal of 28013943769 is 96734931082.

It is not a de Polignac number, because 28013943769 - 2⁷ = 28013943641 is a prime.

It is a super-2 number, since 2×28013943769² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28013943739) 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 31 ways as a sum of consecutive naturals, for example, 26353132 + ... + 26354194.

It is an arithmetic number, because the mean of its divisors is an integer number (1044933120).

Almost surely, 2^28013943769 is an apocalyptic number.

28013943769 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28013943769 is a deficient number, since it is larger than the sum of its proper divisors (5423916071).

28013943769 is a wasteful number, since it uses less digits than its factorization.

28013943769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 28013943769 in words is "twenty-eight billion, thirteen million, nine hundred forty-three thousand, seven hundred sixty-nine".