28489910 has 16 divisors (see below), whose sum is σ = 51687936. Its totient is φ = 11305728.

The previous prime is 28489891. The next prime is 28489921. The reversal of 28489910 is 1998482.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9947 + ... + 12486.

It is an arithmetic number, because the mean of its divisors is an integer number (3230496).

Almost surely, 2^28489910 is an apocalyptic number.

28489910 is a deficient number, since it is larger than the sum of its proper divisors (23198026).

28489910 is a wasteful number, since it uses less digits than its factorization.

28489910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22567.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 28489910 is about 5337.5940272748. The cubic root of 28489910 is about 305.4196856101.

The spelling of 28489910 in words is "twenty-eight million, four hundred eighty-nine thousand, nine hundred ten".