28135068 has 72 divisors (see below), whose sum is σ = 75590928. Its totient is φ = 8068608.

The previous prime is 28135043. The next prime is 28135069. The reversal of 28135068 is 86053182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28135069) 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, 273105 + ... + 273207.

It is an arithmetic number, because the mean of its divisors is an integer number (1049874).

Almost surely, 2^28135068 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 28135068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37795464).

28135068 is an abundant number, since it is smaller than the sum of its proper divisors (47455860).

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

28135068 is a wasteful number, since it uses less digits than its factorization.

28135068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 28135068 is about 5304.2499941085. The cubic root of 28135068 is about 304.1463832182.

The spelling of 28135068 in words is "twenty-eight million, one hundred thirty-five thousand, sixty-eight".