28978998 has 16 divisors (see below), whose sum is σ = 58376640. Its totient is φ = 9589896.

The previous prime is 28978993. The next prime is 28979051. The reversal of 28978998 is 89987982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28978991) 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, 16540 + ... + 18207.

It is an arithmetic number, because the mean of its divisors is an integer number (3648540).

Almost surely, 2^28978998 is an apocalyptic number.

28978998 is an abundant number, since it is smaller than the sum of its proper divisors (29397642).

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

28978998 is a wasteful number, since it uses less digits than its factorization.

28978998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34891.

The product of its digits is 5225472, while the sum is 60.

The square root of 28978998 is about 5383.2144672119. The cubic root of 28978998 is about 307.1574982230.

The spelling of 28978998 in words is "twenty-eight million, nine hundred seventy-eight thousand, nine hundred ninety-eight".