28000305502998 has 16 divisors (see below), whose sum is σ = 59294764594800. Its totient is φ = 8784409569536.

The previous prime is 28000305502993. The next prime is 28000305503147. The reversal of 28000305502998 is 89920550300082.

It is a super-2 number, since 2×28000305502998² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 28000305502998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000305502993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137256399423 + ... + 137256399626.

It is an arithmetic number, because the mean of its divisors is an integer number (3705922787175).

Almost surely, 2^{28000305502998} is an apocalyptic number.

28000305502998 is an abundant number, since it is smaller than the sum of its proper divisors (31294459091802).

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

28000305502998 is a wasteful number, since it uses less digits than its factorization.

28000305502998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274512799071.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 28000305502998 in words is "twenty-eight trillion, three hundred five million, five hundred two thousand, nine hundred ninety-eight".