28214515368 has 96 divisors (see below), whose sum is σ = 82585961640. Its totient is φ = 8650414080.

The previous prime is 28214515361. The next prime is 28214515397. The reversal of 28214515368 is 86351541282.

28214515368 is a `hidden beast` number, since 28 + 214 + 51 + 5 + 368 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13876368804 + 14338146564 = 117798^2 + 119742^2 .

It is a super-2 number, since 2×28214515368² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28214515361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209380 + ... + 316652.

Almost surely, 2^28214515368 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 28214515368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41292980820).

28214515368 is an abundant number, since it is smaller than the sum of its proper divisors (54371446272).

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

28214515368 is a wasteful number, since it uses less digits than its factorization.

28214515368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107579 (or 107572 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The spelling of 28214515368 in words is "twenty-eight billion, two hundred fourteen million, five hundred fifteen thousand, three hundred sixty-eight".