28620788211 has 32 divisors (see below), whose sum is σ = 42552800000. Its totient is φ = 19012428864.

The previous prime is 28620788197. The next prime is 28620788213. The reversal of 28620788211 is 11288702682.

It is a happy number.

28620788211 is a `hidden beast` number, since 2 + 8 + 620 + 7 + 8 + 8 + 2 + 11 = 666.

It is not a de Polignac number, because 28620788211 - 2⁵ = 28620788179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28620788213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11572071 + ... + 11574543.

It is an arithmetic number, because the mean of its divisors is an integer number (1329775000).

Almost surely, 2^28620788211 is an apocalyptic number.

28620788211 is a deficient number, since it is larger than the sum of its proper divisors (13932011789).

28620788211 is a wasteful number, since it uses less digits than its factorization.

28620788211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3840 (or 3834 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 28620788211 in words is "twenty-eight billion, six hundred twenty million, seven hundred eighty-eight thousand, two hundred eleven".