28809718042 has 16 divisors (see below), whose sum is σ = 49420383552. Its totient is φ = 12338948160.

The previous prime is 28809718001. The next prime is 28809718043. The reversal of 28809718042 is 24081790882.

It is not an unprimeable number, because it can be changed into a prime (28809718043) 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 7 ways as a sum of consecutive naturals, for example, 650623 + ... + 693490.

It is an arithmetic number, because the mean of its divisors is an integer number (3088773972).

Almost surely, 2^28809718042 is an apocalyptic number.

28809718042 is a deficient number, since it is larger than the sum of its proper divisors (20610665510).

28809718042 is a wasteful number, since it uses less digits than its factorization.

28809718042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345653.

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 28809718042 in words is "twenty-eight billion, eight hundred nine million, seven hundred eighteen thousand, forty-two".