28215186312 has 32 divisors (see below), whose sum is σ = 70896038400. Its totient is φ = 9357319104.

The previous prime is 28215186301. The next prime is 28215186317. The reversal of 28215186312 is 21368151282.

It is a super-2 number, since 2×28215186312² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28215186317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2979112 + ... + 2988567.

It is an arithmetic number, because the mean of its divisors is an integer number (2215501200).

Almost surely, 2^28215186312 is an apocalyptic number.

It is an amenable number.

28215186312 is an abundant number, since it is smaller than the sum of its proper divisors (42680852088).

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

28215186312 is a wasteful number, since it uses less digits than its factorization.

28215186312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5967885 (or 5967881 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The spelling of 28215186312 in words is "twenty-eight billion, two hundred fifteen million, one hundred eighty-six thousand, three hundred twelve".