28817194536 has 144 divisors (see below), whose sum is σ = 84764007900. Its totient is φ = 8840392704.

The previous prime is 28817194507. The next prime is 28817194537. The reversal of 28817194536 is 63549171882.

28817194536 is a `hidden beast` number, since 2 + 8 + 8 + 17 + 1 + 94 + 536 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 5011790436 + 23805404100 = 70794^2 + 154290^2 .

It is not an unprimeable number, because it can be changed into a prime (28817194537) 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 35 ways as a sum of consecutive naturals, for example, 4291950 + ... + 4298658.

Almost surely, 2^28817194536 is an apocalyptic number.

28817194536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28817194536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42382003950).

28817194536 is an abundant number, since it is smaller than the sum of its proper divisors (55946813364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28817194536 is a wasteful number, since it uses less digits than its factorization.

28817194536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100 (or 7080 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 28817194536 in words is "twenty-eight billion, eight hundred seventeen million, one hundred ninety-four thousand, five hundred thirty-six".