28531360 has 192 divisors, whose sum is σ = 83825280. Its totient is φ = 9031680.

The previous prime is 28531343. The next prime is 28531361. The reversal of 28531360 is 6313582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28531361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 663499 + ... + 663541.

It is an arithmetic number, because the mean of its divisors is an integer number (436590).

Almost surely, 2^28531360 is an apocalyptic number.

28531360 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 28531360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41912640).

28531360 is an abundant number, since it is smaller than the sum of its proper divisors (55293920).

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

28531360 is a wasteful number, since it uses less digits than its factorization.

28531360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 28531360 is about 5341.4754515957. The cubic root of 28531360 is about 305.5677323093.

The spelling of 28531360 in words is "twenty-eight million, five hundred thirty-one thousand, three hundred sixty".