28357845012 has 120 divisors (see below), whose sum is σ = 84813945216. Its totient is φ = 8093587392.

The previous prime is 28357845007. The next prime is 28357845013. The reversal of 28357845012 is 21054875382.

28357845012 is a `hidden beast` number, since 28 + 3 + 578 + 4 + 50 + 1 + 2 = 666.

It is a super-2 number, since 2×28357845012² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28357845013) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2291313 + ... + 2303655.

Almost surely, 2^28357845012 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 28357845012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42406972608).

28357845012 is an abundant number, since it is smaller than the sum of its proper divisors (56456100204).

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

28357845012 is a wasteful number, since it uses less digits than its factorization.

28357845012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13379 (or 13368 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 28357845012 in words is "twenty-eight billion, three hundred fifty-seven million, eight hundred forty-five thousand, twelve".