28698890 has 64 divisors (see below), whose sum is σ = 60652800. Its totient is φ = 9661440.

The previous prime is 28698889. The next prime is 28698899. The reversal of 28698890 is 9889682.

It is not an unprimeable number, because it can be changed into a prime (28698899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192536 + ... + 192684.

It is an arithmetic number, because the mean of its divisors is an integer number (947700).

Almost surely, 2^28698890 is an apocalyptic number.

28698890 is an abundant number, since it is smaller than the sum of its proper divisors (31953910).

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

28698890 is a wasteful number, since it uses less digits than its factorization.

28698890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 28698890 is about 5357.1344952316. The cubic root of 28698890 is about 306.1646414893.

The spelling of 28698890 in words is "twenty-eight million, six hundred ninety-eight thousand, eight hundred ninety".