28704368 has 80 divisors (see below), whose sum is σ = 72423936. Its totient is φ = 10686720.

The previous prime is 28704359. The next prime is 28704371. The reversal of 28704368 is 86340782.

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, 27830 + ... + 28842.

Almost surely, 2^28704368 is an apocalyptic number.

28704368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28704368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36211968).

28704368 is an abundant number, since it is smaller than the sum of its proper divisors (43719568).

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

28704368 is a wasteful number, since it uses less digits than its factorization.

28704368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 28704368 is about 5357.6457516338. The cubic root of 28704368 is about 306.1841203287.

The spelling of 28704368 in words is "twenty-eight million, seven hundred four thousand, three hundred sixty-eight".