28815360 has 208 divisors, whose sum is σ = 106941696. Its totient is φ = 6488064.

The previous prime is 28815313. The next prime is 28815373. The reversal of 28815360 is 6351882.

It is a happy 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, 430047 + ... + 430113.

Almost surely, 2^28815360 is an apocalyptic number.

28815360 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 28815360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53470848).

28815360 is an abundant number, since it is smaller than the sum of its proper divisors (78126336).

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

28815360 is an equidigital number, since it uses as much as digits as its factorization.

28815360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 28815360 is about 5367.9940387448. The cubic root of 28815360 is about 306.5782563878.

The spelling of 28815360 in words is "twenty-eight million, eight hundred fifteen thousand, three hundred sixty".