28444360 has 128 divisors (see below), whose sum is σ = 78796800. Its totient is φ = 9031680.

The previous prime is 28444357. The next prime is 28444373. The reversal of 28444360 is 6344482.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251664 + ... + 251776.

It is an arithmetic number, because the mean of its divisors is an integer number (615600).

Almost surely, 2^28444360 is an apocalyptic number.

28444360 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 28444360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39398400).

28444360 is an abundant number, since it is smaller than the sum of its proper divisors (50352440).

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

28444360 is a wasteful number, since it uses less digits than its factorization.

28444360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 28444360 is about 5333.3254166608. The cubic root of 28444360 is about 305.2568292699.

It can be divided in two parts, 284 and 44360, that added together give a palindrome (44644).

The spelling of 28444360 in words is "twenty-eight million, four hundred forty-four thousand, three hundred sixty".