28117430 has 16 divisors (see below), whose sum is σ = 55212624. Its totient is φ = 10224480.

The previous prime is 28117423. The next prime is 28117433. The reversal of 28117430 is 3471182.

It is a self number, because there is not a number n which added to its sum of digits gives 28117430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28117433) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 127697 + ... + 127916.

It is an arithmetic number, because the mean of its divisors is an integer number (3450789).

Almost surely, 2^28117430 is an apocalyptic number.

28117430 is a deficient number, since it is larger than the sum of its proper divisors (27095194).

28117430 is a wasteful number, since it uses less digits than its factorization.

28117430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255631.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 28117430 is about 5302.5871044237. The cubic root of 28117430 is about 304.0828130228.

The spelling of 28117430 in words is "twenty-eight million, one hundred seventeen thousand, four hundred thirty".