28160000 has 130 divisors (see below), whose sum is σ = 76766052. Its totient is φ = 10240000.

The previous prime is 28159993. The next prime is 28160009. The reversal of 28160000 is 6182.

It is not an unprimeable number, because it can be changed into a prime (28160009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2559995 + ... + 2560005.

Almost surely, 2^28160000 is an apocalyptic number.

28160000 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 28160000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38383026).

28160000 is an abundant number, since it is smaller than the sum of its proper divisors (48606052).

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

28160000 is an frugal number, since it uses more digits than its factorization.

28160000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 28160000 is about 5306.5996645686. The cubic root of 28160000 is about 304.2361968609.

Adding to 28160000 its reverse (6182), we get a palindrome (28166182).

The spelling of 28160000 in words is "twenty-eight million, one hundred sixty thousand".