28938368 has 64 divisors (see below), whose sum is σ = 61893600. Its totient is φ = 13436928.

The previous prime is 28938313. The next prime is 28938383. The reversal of 28938368 is 86383982.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177455 + ... + 177617.

Almost surely, 2^28938368 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 28938368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30946800).

28938368 is an abundant number, since it is smaller than the sum of its proper divisors (32955232).

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

28938368 is a wasteful number, since it uses less digits than its factorization.

28938368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 257 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 28938368 is about 5379.4393759945. The cubic root of 28938368 is about 307.0138810404.

The spelling of 28938368 in words is "twenty-eight million, nine hundred thirty-eight thousand, three hundred sixty-eight".