28739881443 has 64 divisors (see below), whose sum is σ = 47676231680. Its totient is φ = 14995331712.

The previous prime is 28739881439. The next prime is 28739881447. The reversal of 28739881443 is 34418893782.

It is an interprime number because it is at equal distance from previous prime (28739881439) and next prime (28739881447).

It is not a de Polignac number, because 28739881443 - 2² = 28739881439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28739881447) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11648496 + ... + 11650962.

It is an arithmetic number, because the mean of its divisors is an integer number (744941120).

Almost surely, 2^28739881443 is an apocalyptic number.

28739881443 is a deficient number, since it is larger than the sum of its proper divisors (18936350237).

28739881443 is a wasteful number, since it uses less digits than its factorization.

28739881443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936.

The product of its digits is 9289728, while the sum is 57.

The spelling of 28739881443 in words is "twenty-eight billion, seven hundred thirty-nine million, eight hundred eighty-one thousand, four hundred forty-three".