28230144 has 40 divisors (see below), whose sum is σ = 75210960. Its totient is φ = 9409536.

The previous prime is 28230113. The next prime is 28230151. The reversal of 28230144 is 44103282.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7654 + ... + 10725.

It is an arithmetic number, because the mean of its divisors is an integer number (1880274).

Almost surely, 2^28230144 is an apocalyptic number.

28230144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28230144 is an abundant number, since it is smaller than the sum of its proper divisors (46980816).

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

28230144 is an equidigital number, since it uses as much as digits as its factorization.

28230144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18400 (or 18384 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 28230144 is about 5313.2046826750. The cubic root of 28230144 is about 304.4885956455.

The spelling of 28230144 in words is "twenty-eight million, two hundred thirty thousand, one hundred forty-four".