28331336898 has 64 divisors (see below), whose sum is σ = 63622944000. Its totient is φ = 9344356992.

The previous prime is 28331336881. The next prime is 28331336899. The reversal of 28331336898 is 89863313382.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28331336899) 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 31 ways as a sum of consecutive naturals, for example, 4935486 + ... + 4941222.

It is an arithmetic number, because the mean of its divisors is an integer number (994108500).

Almost surely, 2^28331336898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28331336898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31811472000).

28331336898 is an abundant number, since it is smaller than the sum of its proper divisors (35291607102).

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

28331336898 is a wasteful number, since it uses less digits than its factorization.

28331336898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6696 (or 6690 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The spelling of 28331336898 in words is "twenty-eight billion, three hundred thirty-one million, three hundred thirty-six thousand, eight hundred ninety-eight".