28520368342280 has 64 divisors (see below), whose sum is σ = 66453717384000. Its totient is φ = 11003131304704.

The previous prime is 28520368342267. The next prime is 28520368342283. The reversal of 28520368342280 is 8224386302582.

It is a super-2 number, since 2×28520368342280² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28520368342283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11882750 + ... + 14079789.

It is an arithmetic number, because the mean of its divisors is an integer number (1038339334125).

Almost surely, 2^{28520368342280} is an apocalyptic number.

28520368342280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28520368342280 is an abundant number, since it is smaller than the sum of its proper divisors (37933349041720).

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

28520368342280 is a wasteful number, since it uses less digits than its factorization.

28520368342280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25963526 (or 25963522 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 53.

The spelling of 28520368342280 in words is "twenty-eight trillion, five hundred twenty billion, three hundred sixty-eight million, three hundred forty-two thousand, two hundred eighty".