28444460 has 24 divisors (see below), whose sum is σ = 65164176. Its totient is φ = 10343360.

The previous prime is 28444459. The next prime is 28444469. The reversal of 28444460 is 6444482.

It is not an unprimeable number, because it can be changed into a prime (28444469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64427 + ... + 64866.

It is an arithmetic number, because the mean of its divisors is an integer number (2715174).

Almost surely, 2^28444460 is an apocalyptic number.

28444460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28444460 is an abundant number, since it is smaller than the sum of its proper divisors (36719716).

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

28444460 is a wasteful number, since it uses less digits than its factorization.

28444460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129313 (or 129311 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 28444460 is about 5333.3347916665. The cubic root of 28444460 is about 305.2571869934.

It can be divided in two parts, 284 and 44460, that added together give a palindrome (44744).

The spelling of 28444460 in words is "twenty-eight million, four hundred forty-four thousand, four hundred sixty".