28441540 has 24 divisors (see below), whose sum is σ = 60742080. Its totient is φ = 11183328.

The previous prime is 28441531. The next prime is 28441559. The reversal of 28441540 is 4514482.

It is a junction number, because it is equal to n+sod(n) for n = 28441499 and 28441508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10872 + ... + 13231.

It is an arithmetic number, because the mean of its divisors is an integer number (2530920).

Almost surely, 2^28441540 is an apocalyptic number.

28441540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28441540 is an abundant number, since it is smaller than the sum of its proper divisors (32300540).

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

28441540 is a wasteful number, since it uses less digits than its factorization.

28441540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24171 (or 24169 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 28441540 is about 5333.0610347154. The cubic root of 28441540 is about 305.2467411223.

The spelling of 28441540 in words is "twenty-eight million, four hundred forty-one thousand, five hundred forty".