28549870 has 16 divisors (see below), whose sum is σ = 51467040. Its totient is φ = 11402784.

The previous prime is 28549867. The next prime is 28549879. The reversal of 28549870 is 7894582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28549879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6496 + ... + 9964.

It is an arithmetic number, because the mean of its divisors is an integer number (3216690).

Almost surely, 2^28549870 is an apocalyptic number.

28549870 is a deficient number, since it is larger than the sum of its proper divisors (22917170).

28549870 is a wasteful number, since it uses less digits than its factorization.

28549870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 28549870 is about 5343.2078379940. The cubic root of 28549870 is about 305.6337980469.

The spelling of 28549870 in words is "twenty-eight million, five hundred forty-nine thousand, eight hundred seventy".