28169934 has 32 divisors (see below), whose sum is σ = 61061280. Its totient is φ = 8663616.

The previous prime is 28169903. The next prime is 28169971. The reversal of 28169934 is 43996182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12114 + ... + 14250.

It is an arithmetic number, because the mean of its divisors is an integer number (1908165).

Almost surely, 2^28169934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28169934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30530640).

28169934 is an abundant number, since it is smaller than the sum of its proper divisors (32891346).

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

28169934 is a wasteful number, since it uses less digits than its factorization.

28169934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181 (or 2155 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 28169934 is about 5307.5355863150. The cubic root of 28169934 is about 304.2719677778.

The spelling of 28169934 in words is "twenty-eight million, one hundred sixty-nine thousand, nine hundred thirty-four".