28761959861 has 16 divisors (see below), whose sum is σ = 29342498304. Its totient is φ = 28186236144.

The previous prime is 28761959843. The next prime is 28761959869. The reversal of 28761959861 is 16895916782.

It is a cyclic number.

It is not a de Polignac number, because 28761959861 - 2⁶ = 28761959797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28761959794 and 28761959803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28761959869) 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 15 ways as a sum of consecutive naturals, for example, 20154830 + ... + 20156256.

It is an arithmetic number, because the mean of its divisors is an integer number (1833906144).

Almost surely, 2^28761959861 is an apocalyptic number.

It is an amenable number.

28761959861 is a deficient number, since it is larger than the sum of its proper divisors (580538443).

28761959861 is a wasteful number, since it uses less digits than its factorization.

28761959861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840.

The product of its digits is 13063680, while the sum is 62.

The spelling of 28761959861 in words is "twenty-eight billion, seven hundred sixty-one million, nine hundred fifty-nine thousand, eight hundred sixty-one".