28351211112 has 160 divisors (see below), whose sum is σ = 90890553600. Its totient is φ = 8088149376.

The previous prime is 28351211093. The next prime is 28351211137. The reversal of 28351211112 is 21111215382.

28351211112 is a `hidden beast` number, since 28 + 3 + 512 + 11 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3257038 + ... + 3265730.

It is an arithmetic number, because the mean of its divisors is an integer number (568065960).

Almost surely, 2^28351211112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28351211112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45445276800).

28351211112 is an abundant number, since it is smaller than the sum of its proper divisors (62539342488).

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

28351211112 is a wasteful number, since it uses less digits than its factorization.

28351211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9437 (or 9424 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

Adding to 28351211112 its reverse (21111215382), we get a palindrome (49462426494).

The spelling of 28351211112 in words is "twenty-eight billion, three hundred fifty-one million, two hundred eleven thousand, one hundred twelve".