28309124 has 24 divisors (see below), whose sum is σ = 50710296. Its totient is φ = 13824000.

The previous prime is 28309121. The next prime is 28309129. The reversal of 28309124 is 42190382.

It can be written as a sum of positive squares in 4 ways, for example, as 6724 + 28302400 = 82^2 + 5320^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28309121) 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, 43844 + ... + 44484.

It is an arithmetic number, because the mean of its divisors is an integer number (2112929).

Almost surely, 2^28309124 is an apocalyptic number.

It is an amenable number.

28309124 is a deficient number, since it is larger than the sum of its proper divisors (22401172).

28309124 is a wasteful number, since it uses less digits than its factorization.

28309124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 28309124 is about 5320.6319173572. The cubic root of 28309124 is about 304.7722890512.

The spelling of 28309124 in words is "twenty-eight million, three hundred nine thousand, one hundred twenty-four".