28388360 has 128 divisors (see below), whose sum is σ = 85881600. Its totient is φ = 8156160.

The previous prime is 28388341. The next prime is 28388401. The reversal of 28388360 is 6388382.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39686 + ... + 40394.

It is an arithmetic number, because the mean of its divisors is an integer number (670950).

Almost surely, 2^28388360 is an apocalyptic number.

28388360 is a gapful number since it is divisible by the number (20) 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 28388360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42940800).

28388360 is an abundant number, since it is smaller than the sum of its proper divisors (57493240).

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

28388360 is a wasteful number, since it uses less digits than its factorization.

28388360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 28388360 is about 5328.0728223252. The cubic root of 28388360 is about 305.0563722731.

The spelling of 28388360 in words is "twenty-eight million, three hundred eighty-eight thousand, three hundred sixty".