28805850861 has 16 divisors (see below), whose sum is σ = 38547653760. Its totient is φ = 19134103040.

The previous prime is 28805850859. The next prime is 28805850949. The reversal of 28805850861 is 16805850882.

It is a cyclic number.

It is not a de Polignac number, because 28805850861 - 2¹ = 28805850859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28805850811) 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, 911320 + ... + 942398.

It is an arithmetic number, because the mean of its divisors is an integer number (2409228360).

Almost surely, 2^28805850861 is an apocalyptic number.

It is an amenable number.

28805850861 is a deficient number, since it is larger than the sum of its proper divisors (9741802899).

28805850861 is a wasteful number, since it uses less digits than its factorization.

28805850861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32196.

The product of its (nonzero) digits is 1228800, while the sum is 51.

The spelling of 28805850861 in words is "twenty-eight billion, eight hundred five million, eight hundred fifty thousand, eight hundred sixty-one".