28998636 has 48 divisors (see below), whose sum is σ = 71702400. Its totient is φ = 9096192.

The previous prime is 28998631. The next prime is 28998647. The reversal of 28998636 is 63689982.

It is not an unprimeable number, because it can be changed into a prime (28998631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43675 + ... + 44333.

It is an arithmetic number, because the mean of its divisors is an integer number (1493800).

Almost surely, 2^28998636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28998636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35851200).

28998636 is an abundant number, since it is smaller than the sum of its proper divisors (42703764).

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

28998636 is a wasteful number, since it uses less digits than its factorization.

28998636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 876 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 28998636 is about 5385.0381614247. The cubic root of 28998636 is about 307.2268656653.

The spelling of 28998636 in words is "twenty-eight million, nine hundred ninety-eight thousand, six hundred thirty-six".