28889130 has 16 divisors (see below), whose sum is σ = 69333984. Its totient is φ = 7703760.

The previous prime is 28889129. The next prime is 28889141. The reversal of 28889130 is 3198882.

It is a Curzon 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 in 7 ways as a sum of consecutive naturals, for example, 481456 + ... + 481515.

It is an arithmetic number, because the mean of its divisors is an integer number (4333374).

Almost surely, 2^28889130 is an apocalyptic number.

28889130 is an abundant number, since it is smaller than the sum of its proper divisors (40444854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28889130 is a wasteful number, since it uses less digits than its factorization.

28889130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962981.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 28889130 is about 5374.8609284334. The cubic root of 28889130 is about 306.8396563894.

The spelling of 28889130 in words is "twenty-eight million, eight hundred eighty-nine thousand, one hundred thirty".