28124136 has 48 divisors (see below), whose sum is σ = 76658400. Its totient is φ = 9314592.

The previous prime is 28124093. The next prime is 28124167. The reversal of 28124136 is 63142182.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 10855 + ... + 13193.

It is an arithmetic number, because the mean of its divisors is an integer number (1597050).

Almost surely, 2^28124136 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 28124136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38329200).

28124136 is an abundant number, since it is smaller than the sum of its proper divisors (48534264).

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

28124136 is a wasteful number, since it uses less digits than its factorization.

28124136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518 (or 2511 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 28124136 is about 5303.2193995723. The cubic root of 28124136 is about 304.1069856594.

The spelling of 28124136 in words is "twenty-eight million, one hundred twenty-four thousand, one hundred thirty-six".