28578250 has 32 divisors (see below), whose sum is σ = 54213120. Its totient is φ = 11278800.

The previous prime is 28578217. The next prime is 28578257. The reversal of 28578250 is 5287582.

It is not an unprimeable number, because it can be changed into a prime (28578257) 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 15 ways as a sum of consecutive naturals, for example, 19027 + ... + 20473.

It is an arithmetic number, because the mean of its divisors is an integer number (1694160).

Almost surely, 2^28578250 is an apocalyptic number.

28578250 is a deficient number, since it is larger than the sum of its proper divisors (25634870).

28578250 is a wasteful number, since it uses less digits than its factorization.

28578250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 28578250 is about 5345.8628863823. The cubic root of 28578250 is about 305.7350362742.

The spelling of 28578250 in words is "twenty-eight million, five hundred seventy-eight thousand, two hundred fifty".