28814211612 has 144 divisors (see below), whose sum is σ = 76697886720. Its totient is φ = 9111263616.

The previous prime is 28814211593. The next prime is 28814211617. The reversal of 28814211612 is 21611241882.

28814211612 is a `hidden beast` number, since 2 + 8 + 8 + 14 + 21 + 1 + 612 = 666.

It is a super-2 number, since 2×28814211612² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28814211617) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9979233 + ... + 9982119.

Almost surely, 2^28814211612 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 28814211612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38348943360).

28814211612 is an abundant number, since it is smaller than the sum of its proper divisors (47883675108).

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

28814211612 is a wasteful number, since it uses less digits than its factorization.

28814211612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120 (or 3115 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The spelling of 28814211612 in words is "twenty-eight billion, eight hundred fourteen million, two hundred eleven thousand, six hundred twelve".