28959117859 has 16 divisors (see below), whose sum is σ = 34252989120. Its totient is φ = 23955240960.

The previous prime is 28959117841. The next prime is 28959117877. The reversal of 28959117859 is 95871195982.

It is an interprime number because it is at equal distance from previous prime (28959117841) and next prime (28959117877).

It is not a de Polignac number, because 28959117859 - 2⁷ = 28959117731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28959117859.

It is not an unprimeable number, because it can be changed into a prime (28959117359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430039 + ... + 492799.

It is an arithmetic number, because the mean of its divisors is an integer number (2140811820).

Almost surely, 2^28959117859 is an apocalyptic number.

28959117859 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28959117859 is a deficient number, since it is larger than the sum of its proper divisors (5293871261).

28959117859 is a wasteful number, since it uses less digits than its factorization.

28959117859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65070.

The product of its digits is 16329600, while the sum is 64.

The spelling of 28959117859 in words is "twenty-eight billion, nine hundred fifty-nine million, one hundred seventeen thousand, eight hundred fifty-nine".