28244460 has 96 divisors (see below), whose sum is σ = 83768832. Its totient is φ = 7096320.

The previous prime is 28244443. The next prime is 28244467. The reversal of 28244460 is 6444282.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (28244467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133755 + ... + 133965.

It is an arithmetic number, because the mean of its divisors is an integer number (872592).

Almost surely, 2^28244460 is an apocalyptic number.

28244460 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 28244460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41884416).

28244460 is an abundant number, since it is smaller than the sum of its proper divisors (55524372).

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

28244460 is a wasteful number, since it uses less digits than its factorization.

28244460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 28244460 is about 5314.5517214531. The cubic root of 28244460 is about 304.5400574457.

The spelling of 28244460 in words is "twenty-eight million, two hundred forty-four thousand, four hundred sixty".