28398006 has 64 divisors (see below), whose sum is σ = 77683200. Its totient is φ = 7488288.

The previous prime is 28397987. The next prime is 28398037. The reversal of 28398006 is 60089382.

It is a congruent number.

It is an unprimeable number.

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, 2025 + ... + 7803.

It is an arithmetic number, because the mean of its divisors is an integer number (1213800).

Almost surely, 2^28398006 is an apocalyptic number.

28398006 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28398006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38841600).

28398006 is an abundant number, since it is smaller than the sum of its proper divisors (49285194).

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

28398006 is a wasteful number, since it uses less digits than its factorization.

28398006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5810 (or 5804 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 28398006 is about 5328.9779507894. The cubic root of 28398006 is about 305.0909197724.

It can be divided in two parts, 283 and 98006, that added together give a palindrome (98289).

The spelling of 28398006 in words is "twenty-eight million, three hundred ninety-eight thousand, six".