28398205248 has 112 divisors (see below), whose sum is σ = 89604372480. Its totient is φ = 7760991744.

The previous prime is 28398205223. The next prime is 28398205379. The reversal of 28398205248 is 84250289382.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×28398205248² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28398205248.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428428 + ... + 490251.

It is an arithmetic number, because the mean of its divisors is an integer number (800039040).

Almost surely, 2^28398205248 is an apocalyptic number.

28398205248 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28398205248 is an abundant number, since it is smaller than the sum of its proper divisors (61206167232).

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

28398205248 is a wasteful number, since it uses less digits than its factorization.

28398205248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918724 (or 918714 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 28398205248 in words is "twenty-eight billion, three hundred ninety-eight million, two hundred five thousand, two hundred forty-eight".