28459520 has 40 divisors (see below), whose sum is σ = 68242284. Its totient is φ = 11382784.

The previous prime is 28459517. The next prime is 28459531. The reversal of 28459520 is 2595482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26050816 + 2408704 = 5104^2 + 1552^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2999 + ... + 8118.

Almost surely, 2^28459520 is an apocalyptic number.

28459520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28459520 is an abundant number, since it is smaller than the sum of its proper divisors (39782764).

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

28459520 is an equidigital number, since it uses as much as digits as its factorization.

28459520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11140 (or 11124 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 28459520 is about 5334.7464794496. The cubic root of 28459520 is about 305.3110505828.

The spelling of 28459520 in words is "twenty-eight million, four hundred fifty-nine thousand, five hundred twenty".