28938798 has 48 divisors (see below), whose sum is σ = 72030816. Its totient is φ = 8225280.

The previous prime is 28938787. The next prime is 28938799. The reversal of 28938798 is 89783982.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28938799) 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 23 ways as a sum of consecutive naturals, for example, 29890 + ... + 30842.

It is an arithmetic number, because the mean of its divisors is an integer number (1500642).

Almost surely, 2^28938798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28938798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36015408).

28938798 is an abundant number, since it is smaller than the sum of its proper divisors (43092018).

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

28938798 is a wasteful number, since it uses less digits than its factorization.

28938798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209 (or 1206 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 28938798 is about 5379.4793428361. The cubic root of 28938798 is about 307.0154016896.

The spelling of 28938798 in words is "twenty-eight million, nine hundred thirty-eight thousand, seven hundred ninety-eight".