28519144 has 8 divisors (see below), whose sum is σ = 53473410. Its totient is φ = 14259568.

The previous prime is 28519123. The next prime is 28519159. The reversal of 28519144 is 44191582.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26728900 + 1790244 = 5170^2 + 1338^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1782439 + ... + 1782454.

Almost surely, 2^28519144 is an apocalyptic number.

It is an amenable number.

28519144 is a deficient number, since it is larger than the sum of its proper divisors (24954266).

28519144 is a wasteful number, since it uses less digits than its factorization.

28519144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564899 (or 3564895 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 28519144 is about 5340.3318248963. The cubic root of 28519144 is about 305.5241154109.

The spelling of 28519144 in words is "twenty-eight million, five hundred nineteen thousand, one hundred forty-four".