28448840 has 32 divisors (see below), whose sum is σ = 73154880. Its totient is φ = 9753792.

The previous prime is 28448809. The next prime is 28448851. The reversal of 28448840 is 4884482.

It is a junction number, because it is equal to n+sod(n) for n = 28448794 and 28448803.

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, 50522 + ... + 51081.

It is an arithmetic number, because the mean of its divisors is an integer number (2286090).

Almost surely, 2^28448840 is an apocalyptic number.

28448840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28448840 is an abundant number, since it is smaller than the sum of its proper divisors (44706040).

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

28448840 is a wasteful number, since it uses less digits than its factorization.

28448840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101621 (or 101617 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 38.

The square root of 28448840 is about 5333.7454007480. The cubic root of 28448840 is about 305.2728544597.

The spelling of 28448840 in words is "twenty-eight million, four hundred forty-eight thousand, eight hundred forty".