28005402553320 has 32 divisors (see below), whose sum is σ = 84016207660320. Its totient is φ = 7468107347520.

The previous prime is 28005402553319. The next prime is 28005402553327. The reversal of 28005402553320 is 2335520450082.

It is not an unprimeable number, because it can be changed into a prime (28005402553327) 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 7 ways as a sum of consecutive naturals, for example, 116689177186 + ... + 116689177425.

It is an arithmetic number, because the mean of its divisors is an integer number (2625506489385).

Almost surely, 2^{28005402553320} is an apocalyptic number.

28005402553320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28005402553320 is an abundant number, since it is smaller than the sum of its proper divisors (56010805107000).

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

28005402553320 is a wasteful number, since it uses less digits than its factorization.

28005402553320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233378354625 (or 233378354621 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The spelling of 28005402553320 in words is "twenty-eight trillion, five billion, four hundred two million, five hundred fifty-three thousand, three hundred twenty".