28956136 has 32 divisors (see below), whose sum is σ = 60497280. Its totient is φ = 12880000.

The previous prime is 28956131. The next prime is 28956167. The reversal of 28956136 is 63165982.

It is not an unprimeable number, because it can be changed into a prime (28956131) 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, 636 + ... + 7636.

It is an arithmetic number, because the mean of its divisors is an integer number (1890540).

Almost surely, 2^28956136 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 28956136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30248640).

28956136 is an abundant number, since it is smaller than the sum of its proper divisors (31541144).

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

28956136 is a wasteful number, since it uses less digits than its factorization.

28956136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7065 (or 7061 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 28956136 is about 5381.0905957807. The cubic root of 28956136 is about 307.0767031338.

It can be divided in two parts, 28956 and 136, that added together give a palindrome (29092).

The spelling of 28956136 in words is "twenty-eight million, nine hundred fifty-six thousand, one hundred thirty-six".