28273698 has 80 divisors (see below), whose sum is σ = 67038840. Its totient is φ = 8895744.

The previous prime is 28273673. The next prime is 28273699. The reversal of 28273698 is 89637282.

28273698 is a `hidden beast` number, since 282 + 7 + 369 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 26967249 + 1306449 = 5193^2 + 1143^2 .

It is not an unprimeable number, because it can be changed into a prime (28273699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 317638 + ... + 317726.

Almost surely, 2^28273698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28273698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33519420).

28273698 is an abundant number, since it is smaller than the sum of its proper divisors (38765142).

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

28273698 is a wasteful number, since it uses less digits than its factorization.

28273698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 184 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28273698 is about 5317.3017593513. The cubic root of 28273698 is about 304.6451054387.

The spelling of 28273698 in words is "twenty-eight million, two hundred seventy-three thousand, six hundred ninety-eight".