28504144 has 10 divisors (see below), whose sum is σ = 55226810. Its totient is φ = 14252064.

The previous prime is 28504111. The next prime is 28504181. The reversal of 28504144 is 44140582.

It can be written as a sum of positive squares in only one way, i.e., 26132544 + 2371600 = 5112^2 + 1540^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 890739 + ... + 890770.

It is an arithmetic number, because the mean of its divisors is an integer number (5522681).

Almost surely, 2^28504144 is an apocalyptic number.

It is an amenable number.

28504144 is a deficient number, since it is larger than the sum of its proper divisors (26722666).

28504144 is a wasteful number, since it uses less digits than its factorization.

28504144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781517 (or 1781511 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 28504144 is about 5338.9272330685. The cubic root of 28504144 is about 305.4705412756.

The spelling of 28504144 in words is "twenty-eight million, five hundred four thousand, one hundred forty-four".