28135272 has 64 divisors (see below), whose sum is σ = 81259200. Its totient is φ = 8023040.

The previous prime is 28135231. The next prime is 28135277. The reversal of 28135272 is 27253182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28135277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1354 + ... + 7622.

It is an arithmetic number, because the mean of its divisors is an integer number (1269675).

Almost surely, 2^28135272 is an apocalyptic number.

28135272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28135272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40629600).

28135272 is an abundant number, since it is smaller than the sum of its proper divisors (53123928).

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

28135272 is a wasteful number, since it uses less digits than its factorization.

28135272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6306 (or 6302 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 28135272 is about 5304.2692239365. The cubic root of 28135272 is about 304.1471183117.

It can be divided in two parts, 281 and 35272, that added together give a palindrome (35553).

The spelling of 28135272 in words is "twenty-eight million, one hundred thirty-five thousand, two hundred seventy-two".