28555818580 has 48 divisors (see below), whose sum is σ = 64663018560. Its totient is φ = 10557216000.

The previous prime is 28555818509. The next prime is 28555818593. The reversal of 28555818580 is 8581855582.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 900846 + ... + 932005.

It is an arithmetic number, because the mean of its divisors is an integer number (1347146220).

Almost surely, 2^28555818580 is an apocalyptic number.

28555818580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28555818580 is an abundant number, since it is smaller than the sum of its proper divisors (36107199980).

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

28555818580 is a wasteful number, since it uses less digits than its factorization.

28555818580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832920 (or 1832918 counting only the distinct ones).

The product of its (nonzero) digits is 5120000, while the sum is 55.

The spelling of 28555818580 in words is "twenty-eight billion, five hundred fifty-five million, eight hundred eighteen thousand, five hundred eighty".