28117124 has 48 divisors (see below), whose sum is σ = 60103680. Its totient is φ = 11249280.

The previous prime is 28117121. The next prime is 28117129. The reversal of 28117124 is 42171182.

It is a junction number, because it is equal to n+sod(n) for n = 28117093 and 28117102.

It is not an unprimeable number, because it can be changed into a prime (28117121) 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, 24614 + ... + 25730.

It is an arithmetic number, because the mean of its divisors is an integer number (1252160).

Almost surely, 2^28117124 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 28117124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30051840).

28117124 is an abundant number, since it is smaller than the sum of its proper divisors (31986556).

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

28117124 is a wasteful number, since it uses less digits than its factorization.

28117124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188 (or 1186 counting only the distinct ones).

The product of its digits is 896, while the sum is 26.

The square root of 28117124 is about 5302.5582505051. The cubic root of 28117124 is about 304.0817099149.

The spelling of 28117124 in words is "twenty-eight million, one hundred seventeen thousand, one hundred twenty-four".