28395480 has 64 divisors (see below), whose sum is σ = 87183360. Its totient is φ = 7394688.

The previous prime is 28395469. The next prime is 28395487. The reversal of 28395480 is 8459382.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28395487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2409 + ... + 7911.

It is an arithmetic number, because the mean of its divisors is an integer number (1362240).

Almost surely, 2^28395480 is an apocalyptic number.

28395480 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 28395480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43591680).

28395480 is an abundant number, since it is smaller than the sum of its proper divisors (58787880).

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

28395480 is a wasteful number, since it uses less digits than its factorization.

28395480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560 (or 5556 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 28395480 is about 5328.7409394715. The cubic root of 28395480 is about 305.0818735679.

The spelling of 28395480 in words is "twenty-eight million, three hundred ninety-five thousand, four hundred eighty".