28939368 has 64 divisors (see below), whose sum is σ = 75640320. Its totient is φ = 9216000.

The previous prime is 28939343. The next prime is 28939369. The reversal of 28939368 is 86393982.

It is not an unprimeable number, because it can be changed into a prime (28939369) 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, 71968 + ... + 72368.

It is an arithmetic number, because the mean of its divisors is an integer number (1181880).

Almost surely, 2^28939368 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 28939368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37820160).

28939368 is an abundant number, since it is smaller than the sum of its proper divisors (46700952).

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

28939368 is a wasteful number, since it uses less digits than its factorization.

28939368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 534 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The square root of 28939368 is about 5379.5323216800. The cubic root of 28939368 is about 307.0174174106.

The spelling of 28939368 in words is "twenty-eight million, nine hundred thirty-nine thousand, three hundred sixty-eight".